SIST EN 16037:2012
(Main)Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfate
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfate
This European Standard is applicable to sodium hydrogen sulfate used for treatment of water intended for human consumption. It describes the characteristics of sodium hydrogen sulfate and specifies the requirements and the corresponding test methods for sodium hydrogen sulfate. It gives information on its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhydrogensulfat
Diese Europäische Norm gilt für Natriumhydrogensulfat zur Aufbereitung von Wasser für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften von Natriumhydrogensulfat und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Natriumhydrogensulfat fest. Sie enthält Angaben zu dessen Anwendung in der Wasseraufbereitung.
Produits chimiques uitilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfate de sodium
La présente Norme européenne s’applique à l’hydrogénosulfate de sodium utilisé pour le traitement de l’eau destinée à la consommation humaine. Elle décrit les caractéristiques de l’hydrogénosulfate de sodium et spécifie les exigences et les méthodes d’essai correspondantes. Elle donne des informations sur son emploi dans le traitement de l’eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfat
Ta evropski standard obravnava natrijev hidrogen sulfat, ki se uporablja za pripravo pitne vode. Opisuje značilnosti natrijevega hidrogen sulfata ter določa zahteve in ustrezne preskusne metode zanj. Standard podaja informacije o uporabi natrijevega hidrogen sulfata pri pripravi vode.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfatProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - NatriumhydrogensulfatProduits chimiques uitilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfate de sodiumChemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfate71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 16037:2012SIST EN 16037:2012en,fr,de01-september-2012SIST EN 16037:2012SLOVENSKI
STANDARD
SIST EN 16037:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16037
July 2012 ICS 71.100.80 English Version
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfate
Produits chimiques uitilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfate de sodium
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumhydrogensulfat This European Standard was approved by CEN on 24 May 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16037:2012: ESIST EN 16037:2012
EN 16037:2012 (E) 2 Contents Page Foreword .3Introduction .31Scope .52Normative references .53Description .54Purity criteria .75Test methods .86Labelling – Transportation – Storage . 14Annex A (informative)
General information on sodium hydrogen sulfate . 16Annex B (normative)
General rules relating to safety . 18Annex C (normative)
Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) . 19Bibliography . 25 SIST EN 16037:2012
EN 16037:2012 (E) 3 Foreword This document (EN 16037:2012) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2013, and conflicting national standards shall be withdrawn at the latest by January 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16037:2012
EN 16037:2012 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European Standard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. SIST EN 16037:2012
EN 16037:2012 (E) 5 1 Scope This European Standard is applicable to sodium hydrogen sulfate used for treatment of water intended for human consumption. It describes the characteristics of sodium hydrogen sulfate and specifies the requirements and the corresponding test methods for sodium hydrogen sulfate. It gives information on its use in water treatment. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1233, Water quality — Determination of chromium — Atomic absorption spectrometric methods
EN 1483, Water quality — Determination of mercury — Method using atomic absorption spectrometry EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696) ISO 2479, Sodium chloride for industrial use — Determination of matter insoluble in water or in acid and preparation of principal solutions for other determinations ISO 2483, Sodium chloride for industrial use — Determination of the loss of mass at 110 degrees C ISO 3165, Sampling of chemical products for industrial use — Safety in sampling ISO 6206, Chemical products for industrial use — Sampling — Vocabulary ISO 6332, Water quality — Determination of iron — Spectrometric method using 1,10-phenanthroline ISO 8213, Chemical products for industrial use — Sampling techniques — Solid chemical products in the form of particles varying from powders to coarse lumps ISO 8288, Water quality — Determination of cobalt, nickel, copper, zinc, cadmium and lead — Flame atomic absorption spectrometric methods 3 Description 3.1 Identification 3.1.1 Chemical name Sodium hydrogen sulfate. 3.1.2 Synonym or common name Sodium bisulfate. 3.1.3 Relative molecular mass 120,06 g/mol. SIST EN 16037:2012
EN 16037:2012 (E) 6 3.1.4 Empirical formula
NaHSO4 . 3.1.5 CAS-Registry-Number1) 7681-38-1. 3.1.6 EINECS-Number2) 231-665-7. 3.2 Commercial form Powder or beads, free flowing. 3.3 Physical properties 3.3.1 Appearance and odour White to slightly yellow, odourless. 3.3.2 Density The bulk density of the product is approximately between 1 400 kg/m3 and 1 450 kg/m3. 3.3.3 Solubility in water Approximately 1 080 g/l at 25 °C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point Not applicable. 3.3.6 Melting point at 100 kPa3) Approximately 180 °C. Note 1 to entry: The product decomposes at higher temperatures to sodium disulfate and water. 3.3.7 Specific heat Not applicable. 3.3.8 Viscosity (dynamic) Not applicable.
1)
Chemical Abtracts Service Registry Number. 2)
European Inventory of Existing Commercial Chemical Substances. 3)
100 kPa = 1 bar. SIST EN 16037:2012
EN 16037:2012 (E) 7 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Sodium hydrogen sulfate is hygroscopic.
Aqueous solutions of the product exhibit a acid reaction and are corrosive to metals: acid constant pKS = 1,99 a solution with a mass fraction of 20 % has a pH value between 1 and 1,2 at 25 °C. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium hydrogen sulfate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to the relevant authorities. NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in the product standard. Limits have been given for impurities and chemicals parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product The commercial product shall contain a mass fraction of sodium hydrogen sulfate greater than 95,2 %. 4.3 Impurities and by-products The content of impurities and by-products shall be in accordance with Table 1. SIST EN 16037:2012
EN 16037:2012 (E) 8 Table 1 — Impurities and by-products Parameter Limit in % (mass fraction) Sodium sulfate max. 4,8 Water max. 0,8 Water insoluble substances max. 0,05 Iron max. 0,01
4.4 Chemical Parameters The product shall conform to the requirements specified in Table 2. Table 2 — Chemical parameters Parameter Limit in mg/kg NaHSO4 Arsenic (As) max. 0,1 Cadmium (Cd) max. 0,1 Chromium (Cr) max. 1 Mercury (Hg) max. 0,1 Nickel (Ni) max. 1 Lead (Pb) max. 1 Antimony (Sb)
max. 1 Selenium (Se)
max. 1 NOTE Pesticides, polycyclic aromatic hydrocarbons and halogenated organic substances are not by-products of the manufacturing process. For parametric values on chemical parameters content in drinking water, see [1]. 5 Test methods 5.1 Sampling Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. Observe the general recommendations of ISO 3165 and take account of ISO 6206.
5.2 Analysis 5.2.1 Determination of sodium hydrogen sulfate 5.2.1.1 Principle Alkalimetric titration with sodium hydroxide solution. 5.2.1.2 Reagents 5.2.1.2.1
All reagents shall be of a recognized analytical grade. De-ionized water (conforming to grade 3 of EN ISO 3696) is sufficient. 5.2.1.2.2
Sodium hydoxide solution, c(NaOH) = 0,1 mol/l SIST EN 16037:2012
EN 16037:2012 (E) 9 5.2.1.3 Apparatus Ordinary laboratory apparatus and glassware together with the following. 5.2.1.3.1 Potentiometric titrimeter 5.2.1.3.2 Automatic burette, volume 50 ml, equipped with an injection tip. 5.2.1.3.3 Electromechanical stirrer 5.2.1.3.4 Glass beaker, capacity 250 ml 5.2.1.4 Procedure 5.2.1.4.1 Test solution Weigh, to the nearest 0,1 mg, a test portion of approximately 0,2 g into a dry, clean beaker (5.2.1.3.4). 5.2.1.4.2 Determination Input the calculation data in the titration microprocessor in accordance with the instruction manual. Place the pH electrode in the titration beaker and titrate with the sodium hydroxide solution (5.2.1.2.2). Record the titration curve and determine the inflection point as the equivalent point of the potentiometric titration. 5.2.1.5 Expression of results The sodium hydrogen sulfate content, C1, expressed as a percentage by mass, is given by the following formula (1): mcVC1201××= (1) where V is the volume, expressed in millilitres, of the sodium hydroxide solution (5.2.1.2.2) used for the titration; c is the concentration, in moles per litre, of the sodium hydroxide solution (5.2.1.2.2); m is the mass of the test portion, expressed in grams. 120 is the mass equivalent of sodium hydrogen sulfate in grams corresponding to 1 000 ml of sodium hydroxide solution with c(NaOH) = 0,1 mol/l. 5.2.1.6 Repeatability limit The absolute difference between two single test results, obtained under repeatability conditions, shall not be greater than the repeatability value, r, as calculated from the following formula: r = 0,001 z where SIST EN 16037:2012
EN 16037:2012 (E) 10 z is the mean of the two results, expressed in mass fraction %. NOTE Repeatibility conditions are conditions where mutually independent test results are obtained with the same method on identical test material in the same laboratory by the same operator using the same equipment within short intervals of time. 5.2.2 By-products 5.2.2.1 Determination of water The content of water is determined according to ISO 2483. 5.2.2.2 Determination of water insoluble substances The content of insoluble substances is determined according to ISO 2479. 5.2.2.3 Determination of sodium sulfate The content of sodium sulfate, CS, expressed in mass fraction %, is calculated by the following formula (2): Cs =
100 - C1 – CW – Ci – C2
(2) where C1 is the content of sodium hydrogen sulfate (see 5.2.1); CW is the content of water (see 5.2.2.1); Ci is the content of insoluble substances (see 5.2.2.2); C2 is the content of iron (see 5.2.2.4). 5.2.2.4 Determination of iron (Fe) 5.2.2.4.1 Principle Iron is determined by visible absorption spectrometry of its 1,10-phenanthroline complex. 5.2.2.4.2 Reagents All reagents shall be of a recognised analytical grade and the water used shall conform to the appropriate grade specified in EN ISO 3696. 5.2.2.4.2.1 Nitric acid, solution, c(HNO3) = 2,5 mol/l. 5.2.2.4.3 Procedure 5.2.2.4.3.1 Test solution Weigh, to the nearest 0,1 mg, 1 g (m) of a test portion into a 100 ml one-mark volumetric flask. Add 0,5 ml of nitric acid (5.2.2.4.2.1), dilute with a few millilitres of water and mix. Dilute to volume with water and homogenize. 5.2.2.4.3.2 Determination The concentration of iron in the test solution (5.2.2.4.3.1) is determined according to ISO 6332. SIST EN 16037:2012
EN 16037:2012 (E) 11 The determination gives an interim result (y) expressed in milligrams per litre that needs to be corrected to give the final concentration according to the formula in 5.2.2.4.4. 5.2.2.4.4 Expression of results From the interim results (y) determined (see 5.2.2.4.3.2), the content C2 of iron in the test portion, expressed in milligrams per kilogram is given by the following formula (3): mVyC×=2 (3) where Y is the interim result (see 5.2.2.4.3.2); V is the volume, expressed in millilitres, of the test solution (5.2.2.4.3.1) (= 100 ml); m is the mass, expressed in grams, of the test sample. 5.2.3 Chemical parameters 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni) and selenium (Se) 5.2.3.1.1 Principle The elements arsenic, antimony, cadmium, chromium, lead, nickel and selenium are determined by atomic absorption spectrometry. 5.2.3.1.2 Reagents 5.2.3.1.2.1 General All reagents shall be of a recognised analytical grade and the water used shall conform to grade 2 specified in EN ISO 3696. 5.2.3.1.2.2 Nitric acid, concentrated, density ρ = 1,42 g/ml. 5.2.3.1.2.3 Nitric acid, solution, c(HNO3) = 2,5 mol/l. 5.2.3.1.2.4 Barium nitrate solution, c(Ba(NO3)2) = 75 g/l. 5.2.3.1.3 Procedure 5.2.3.1.3.1 Test portion Weigh, to the nearest 0,01 g for Cd, Ni, Pb, As and Sb: 1 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask; for Cr: 2 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask; for Se: 0,5 g (m) of the laboratory sample into a 100 ml one-mark volumetric flask. SIST EN 16037:2012
EN 16037:2012 (E) 12 5.2.3.1.3.2 Test solution For Cd: dissolve the test portion with 40 ml of water and after adding 30 ml of barium nitrate solution (5.2.3.1.2.4), bring solution briefly to boiling point and after cooling dilute to volume with water and homogenize. The determination is made with the clear supernatant solution after the barium sulfate has settled out. For Cr and Ni: add 0,5 ml of nitric acid (5.2.3.1.2.3) to the test portion, dilute with a few millilitres of water and mix. Dilute to volume with water and homogenize. For Pb and As: dissolve the test portion with a few millilitres of water and mix. Dilute to volume with water and homogenize. For Se and Sb: add 2 ml of nitric acid (5.2.2.1.2.2) to the test portion, dilute with a few millilitres of water and mix. Dilute to volume with water and homogenize. 5.2.3.1.3.3 Determination Determine the content of chemical parameters in the test solution (5.2.3.1.3.2) in accordance with the following methods: Cd, Ni and Pb: in accordance with ISO 8288, Method A
for direct determination by flame atomic absorption spectrometry; Cr: in accordance with EN 1233; As, Se and Sb: in accordance with the method given in Annex C. These methods will give an interim result (y) expressed in milligrams per litre that needs to be corrected to give the final concentration according to the formula in 5.2.3.1.4. 5.2.3.1.4 Expression of results From the interim results (y) determined (see 5.2.3.1.3.3), the content, C2, of each chemical parameter in the laboratory sample, expressed in milligrams per kilogram of sodium hydrogen sulfate is given by the following formula (4): 12100CmVyC××= (4) where Y is the interim result (5.2.3.1.3.3); V is the volume, expressed in millilitres, of the test solution (5.2.3.1.3.2) (= 100 ml); m is the mass, expressed in grams, of the test portion; C1 is the sodium hydrogen sulfate content in percentage by mass of product (see 5.2.1.5). SIST EN 16037:2012
EN 16037:2012 (E) 13 5.2.3.2 Determination of the mercury (Hg) 5.2.3.2.1 Principle The element mercury is determined by flameless atomic absorption spectrometry in accordance with EN 1483. 5.2.3.2.2 Reagents All reagents shall be of a recognized analytical grade and the water used shall conform to grade 2 specified in EN ISO 3696. 5.2.3.2.2.1 Potassium permanganate solution, c(KMnO4) = 50 g/l. 5.2.3.2.2.2 Sulfuric acid, concentrated, density ρ = 1,84 g/ml. 5.2.3.2.2.3 Hydroxylammonium chloride solution, c(NH2OH · HCl) = 100 g/l. 5.2.3.2.2.4 Potassium dichromate solution, c(K2Cr2O7) = 4 g/l in 50 % (volume fraction) nitric acid solution. 5.2.3.2.3 Procedure 5.2.3.2.3.1 Test portion Weigh, to the nearest 0,01 g, 10 g (m2) of the laboratory sample, into a glass beaker. 5.2.3.2.3.2 Test solution Quantitatively transfer the test portion to a 100 ml (V1) volumetric flask. Dilute with water to the mark and mix (solution A). Pipette, accurately 10 ml of the solution A. Transfer to a 250 ml conical flask and add 60 ml of water, 20 ml of a potassium permanganate solution (5.2.3.2.2.1) and five 1 ml portions of sulfuric acid (5.2.3.2.2.2). Heat and keep boiling for 10 min. Allow to cool. Just dissolve the precipitate (MnO2) with hydroxylammonium chloride (5.2.3.2.2.3), add 5 ml of the potassium dichromate solution (5.2.3.2.2.4) and transfer to a 100 ml (V2) volumetric flask. Dilute to the mark with water and mix. 5.2.3.2.3.3 Determination Proceed as described in EN 1483. 5.2.3.2.4 Expression of result The interim result for mercury content (y) expressed in milligrams per litre is given by the following formula (5): 102VyyA×= (5) where yA is the result obtained in 5.2.3.2.3.3, for the concentration of mercury in the test solution, expressed in milligrams per litre; V2 is the volume in millilitres of the test solution. SIST EN 16037:2012
EN 16037:2012 (E) 14 The mercury content, C3, in milligrams per kilogram of sodium hydrogen sulfate is given by the following formula (6): 123100CmVyC××= (6) where y is the previously determined interim result for mercury content; V1 is the volume, in millilitres, of the solution A (see 5.2.3.2.3.2); m2 is the mass, expressed in grams, of the test portion (see 5.2.3.2.3.1); C1 is the sodium hydrogen sulfate content in percent by mass (see 5.2.1.5). 6 Labelling – Transportation – Storage 6.1 Means of delivery Sodium hydrogen sulfate shall be delivered in polyethylene bags, with net contents of 25 kg, or in flexible bulk containers, with net contents of maximum 1 000 kg. In order that the purity of the product is not affected, the means of delivery shall not have been used previously
...
SLOVENSKI STANDARD
oSIST prEN 16037:2010
01-maj-2010
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfat
Chemicals used for treatment of water intended for human consumption - Sodium
hydrogen sulfate
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch -
Natriumhydrogensulfat
Produits chimiques uitilisés pour le traitement de l'eau destinée à la consommation
humaine - Hydrogénosulfate de sodium
Ta slovenski standard je istoveten z: prEN 16037
ICS:
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
oSIST prEN 16037:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 16037:2010
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oSIST prEN 16037:2010
EUROPEAN STANDARD
DRAFT
prEN 16037
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2010
ICS 71.100.80
English Version
Chemicals used for treatment of water intended for human
consumption - Sodium hydrogen sulfate
Produits chimiques uitilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Hydrogénosulfate menschlichen Gebrauch - Natriumhydrogensulfat
de sodium
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 164.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16037:2010: E
worldwide for CEN national Members.
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oSIST prEN 16037:2010
prEN 16037:2010 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Description .5
4 Purity criteria .7
5 Test methods .8
6 Labelling – Transportation – Storage . 14
Annex A (informative) General information on sodium hydrogen sulfate . 16
Annex B (normative) General rules relating to safety . 17
Annex C (normative) Determination of arsenic, antimony and selenium (atomic absorption
spectrometry hydride technique) . 18
Bibliography . 24
2
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oSIST prEN 16037:2010
prEN 16037:2010 (E)
Foreword
This document (prEN 16037:2010) has been prepared by Technical Committee CEN/TC 164 “Water supply”,
the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
Note : As this standard will not be published before end 2010, chapter 6.2 takes into account the new Regulation (EC) No
1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging
of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation
(EC) No 1907/2006.
3
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oSIST prEN 16037:2010
prEN 16037:2010 (E)
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the
product covered by this European Standard:
a) this European Standard provides no information as to whether the product may be used without
restriction in any of the Member States of the EU or EFTA;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of this product remain in force.
NOTE Conformity with this European Standard does not confer or imply acceptance or approval of the product in any
of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to
regulation or control by National Authorities.
4
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oSIST prEN 16037:2010
prEN 16037:2010 (E)
1 Scope
This European Standard is applicable to sodium hydrogen sulfate used for treatment of water intended for
human consumption. It describes the characteristics of sodium hydrogen sulfate and specifies the
requirements and the corresponding test methods for sodium hydrogen sulfate. It gives information on its use
in water treatment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 1483, Water quality — Determination of mercury — Method using atomic absorption spectrometry
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987)
ISO 2479, Sodium chloride for industrial use — Determination of matter insoluble in water or in acid and
preparation of principal solutions for other determinations
ISO 2483, Sodium chloride for industrial use — Determination of the loss of mass at 110 degrees C
ISO 3165, Sampling of chemical products for industrial use — Safety in sampling
ISO 6206, Chemical products for industrial use — Sampling — Vocabulary
ISO 6332, Water quality — Determination of iron — spectrometric method using 1,10-phenanthroline
ISO 8213, Chemical products for industrial use — Sampling techniques - Solid chemical products in the form
of particles varying from powders to coarse lumps
ISO 8288, Water quality — Determination of cobalt, nickel, copper, zinc, cadmium and lead — Flame atomic
absorption spectrometric methods
EN 1233, Water quality — Determination of chromium — Atomic absorption spectrometric methods
3 Description
3.1 Identification
3.1.1 Chemical name
Sodium hydrogen sulfate.
3.1.2 Synonym or common name
Sodium bisulfate
3.1.3 Relative molecular mass
120,06 g/mol
5
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oSIST prEN 16037:2010
prEN 16037:2010 (E)
3.1.4 Empirical formula
NaHSO
4
1)
3.1.5 CAS-Registry-Number
7681-38-1
2)
3.1.6 EINECS-Number
231-665-7
3.2 Commercial form
Powder or beads, free flowing.
3.3 Physical properties
3.3.1 Appearance and odour
White to slightly yellow, odourless.
3.3.2 Density
3 3
The bulk density of the product is approximately between 1 400 kg/m and 1 450 kg/m .
3.3.3 Solubility in water
Approximately 1 080 g/L at 25 °C.
3.3.4 Vapour pressure
Not applicable.
3.3.5 Boiling point
Not applicable.
3)
3.3.6 Melting point at 100 kPa
Approximately 180 °C
NOTE The product decomposes at higher temperatures to sodium disulfate and water.
3.3.7 Specific heat
Not applicable.
1
Chemical Abtracts Service Registry Number.
2
Chemical Abtracts Service Registry Number.
3
100 kPa = 1 bar
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3.3.8 Viscosity (dynamic)
Not applicable.
3.3.9 Critical temperature
Not applicable.
3.3.10 Critical pressure
Not applicable.
3.3.11 Physical hardness
Not applicable.
3.4 Chemical properties
Sodium hydrogen sulfate is hygroscopic.
Aqueous solutions of the product exhibit a acid reaction and are corrosive to metals:
acid constant pK = 1,99
S
a solution with a mass fraction of 20 % has a pH value between 1 and 1,2 at 25 °C.
4 Purity criteria
4.1 General
This European Standard specifies the minimum purity requirements for sodium hydrogen sulfate used for the
treatment of water intended for human consumption. Limits are given for impurities commonly present in the
product. Depending on the raw material and the manufacturing process other impurities may be present and,
if so, this shall be notified to the user and when necessary to the relevant authorities.
NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity
for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents
of other impurities and additives used in the product not stated in the product standard.
Limits have been given for impurities and chemicals parameters where these are likely to be present in
significant quantities from the current production process and raw materials. If the production process or raw
materials leads to significant quantities of impurities, by-products or additives being present, this shall be
notified to the user.
4.2 Composition of commercial product
The commercial product shall contain a mass fraction of sodium hydrogen sulfate greater than 95,2 per cent.
4.3 Impurities and by-products
The content of impurities and by-products shall be in accordance with Table 1.
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Table 1 — Impurities and by-products
Parameter Limit in % (m/m)
Sodium Sulfate max 4.8
Water max. 0.8
Water insoluble substances max. 0.05
Iron max. 0.01
4.4 Chemical Parameters
The product shall conform to the requirements specified in Table 2.
Table 2 — Chemical parameters
Parameter Limit in mg/kg NaHSO
4
Arsenic (As) max. 0,1
Cadmium (Cd) max. 0,1
Chromium (Cr) max. 1
Mercury (Hg) max. 0,1
Nickel (Ni) max. 1
Lead (Pb) max. 1
Antimony (Sb) max. 1
Selenium (Se) max. 1
NOTE Pesticides, polycyclic aromatic hydrocarbons and halogenated organic substances are not by-products of the
manufacturing process. For parametric values on chemical parameters content in drinking water, see [1].
5 Test methods
5.1 Sampling
Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. Observe the
general recommendations of ISO 3165 and take account of ISO 6206.
5.2 Analysis
5.2.1 Determination of sodium hydrogen sulfate
5.2.1.1 Principle
Alkalimetric titration with sodium hydroxide solution.
5.2.1.2 Reagents
5.2.1.2.1 All reagents shall be of a recognized analytical grade. De-ionized water (conforming to grade 3
of EN ISO 3696) is sufficient.
5.2.1.2.2 Sodium hydoxide solution, c(NaOH) = 0,1 mol/L
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5.2.1.3 Apparatus
Ordinary laboratory apparatus and glassware together with the following.
5.2.1.3.1 Potentiometric titrimeter.
5.2.1.3.2 Automatic burette, volume 50 mL, equipped with an injection tip.
5.2.1.3.3 Electromechanical stirrer.
5.2.1.3.4 Glass beaker, capacity 250 mL.
5.2.1.4 Procedure
5.2.1.4.1 Test solution
Weigh, to the nearest 0,1 mg, a test portion of approximately 0,2 g into a dry, clean beaker (5.2.1.3.4).
5.2.1.4.2 Determination
Input the calculation data in the titration microprocessor in accordance with the instruction manual.
Place the pH electrode in the titration beaker and titrate with the sodium hydroxide solution (5.2.1.2).
Record the titration curve and determine the inflection point as the equivalent point of the potentiometric
titration.
5.2.1.5 Expression of results
The sodium hydrogen sulfate content, C , expressed as a percentage by mass, is given by the following
1
equation:
V •c • 120
C =
1
m
where
V is the volume, expressed in millilitres, of the sodium hydroxide solution (5.2.1.2) used for the titration;
c is the concentration, in moles per litre, of the sodium hydroxide solution (5.2.1.2);
m is the mass of the test portion, expressed in grams.
120 is the mass equivalent of sodium hydrogen sulfate in grams corresponding to 1 000 ml of sodium
hydroxide solution with c(NaOH) = 0,1 mol/L.
5.2.1.6 Repeatability limit
The absolute difference between two single test results, obtained under repeatability conditions, shall not be
greater than the repeatability value, r, as calculated from the following equation:
r = 0,001 z
where
z is the mean of the two results, expressed in mass fraction %.
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NOTE Repeatibility conditions are conditions where mutually independent test results are obtained with the same
method on identical test material in the same laboratory by the same operator using the same equipment within short
intervals of time.
5.2.2 By-products
5.2.2.1 Determination of water
The content of water is determined according to ISO 2483.
5.2.2.2 Determination of water insoluble substances
The content of insoluble substances is determined according to ISO 2479.
5.2.2.3 Determination of sodium sulfate
The content of sodium sulfate, C , expressed in mass fraction %, is calculated by the following equation (2):
S
C = 100 - C – C – C – C (2)
s 1 W i 2
where
C is the content of sodium hydrogen sulfate (see 5.2.1)
1
C is the content of water (see 5.2.2.1)
W
C is the content of insoluble substances (see 5.2.2)
i
C is the content of iron (see 5.2.4)
2
5.2.2.4 Determination of iron (Fe)
5.2.2.4.1 Principle
Iron is determined by visible absorption spectrometry of its 1,10-phenanthroline complex.
5.2.2.4.2 Reagents
All reagents shall be of a recognised analytical grade and the water used shall conform to the appropriate
grade specified in EN ISO 3696.
5.2.2.4.2.1 Nitric acid, solution, c (HNO ) = 2,5 mol/L.
3
5.2.2.4.3 Procedure
5.2.2.4.3.1 Test solution
Weigh, to the nearest 0,1 mg, 1 g (m) of a test portion into a 100 mL one-mark volumetric flask. Add 0,5 mL of
nitric acid (5.2.2.1.2.2), dilute with a few millilitres of water and mix. Dilute to volume with water and
homogenize.
5.2.2.4.3.2 Determination
The concentration of iron in the test solution (5.2.2.4.3.1) is determined according to ISO 6332.
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The determination gives an interim result (y) expressed in milligrams per litre that needs to be corrected to
give the final concentration according to the equation in 5.2.2.1.4.
5.2.2.1.4 Expression of results
From the interim results (y) determined (see 5.2.2.4.3.2), the content C2 of iron in the test portion, expressed
in milligrams per kilogram is given by the following equation (3):
V
C = y • (3)
2
m
where
Y is the interim result (see 5.2.2.4.3.2);
V is the volume, expressed in millilitres, of the test solution (5.2.2.1.3.2) (= 100 ml);
m is the mass, expressed in grams, of the test sample.
5.2.3 Chemical parameters
5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel
(Ni) and selenium (Se)
5.2.3.1.1 Principle
The elements arsenic, antimony, cadmium, chromium, lead, nickel and selenium are determined by atomic
absorption spectrometry.
5.2.3.1.2 Reagents
All reagents shall be of a recognised analytical grade and the water used shall conform to grade 2 specified in
EN ISO 3696.
5.2.3.1.2.1 Nitric acid, concentrated, density ≥ 1,42 g/mL.
5.2.3.1.2.2 Nitric acid, solution, c (HNO ) = 2,5 mol/L.
3
5.2.3.1.2.3 Barium nitrate, Ba(NO )
3 2
5.2.3.1.3 Procedure
5.2.3.1.3.1 Test portion
Weigh, to the nearest 0,01 g
for Cd, Ni, Pb, As and Sb: 1 g (m) of the laboratory sample into a 100 mL one-mark volumetric flask;
for Cr: 2 g (m) of the laboratory sample into a 100 mL one-mark volumetric flask;
for Se: 0,5 g (m) of the laboratory sample into a 100 mL one-mark volumetric flask.
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5.2.3.1.3.2 Test solution
For Cd: dissolve the test portion with 40 mL of water and after adding 20 mL of barium nitrate (5.2.2.1.2.3),
bring solution briefly to boiling point and after cooling dilute to volume with water and homogenize. The
determination is made with the clear supernatant solution after the barium sulfate has settled out.
For Cr and Ni: add 0,5 mL of nitric acid (5.2.2.1.2.2) to the test portion, dilute with a few millilitres of water and
mix. Dilute to volume with water and homogenize.
For Pb and As: dissolve the test portion with a few millilitres of water and mix. Dilute to volume with water and
homogenize.
For Se and Sb: add 2 mL of nitric acid (5.2.2.1.2.1) to the test portion, dilute with a few millilitres of water and
mix. Dilute to volume with water and homogenize.
5.2.3.1.3.3 Determination
Determine the content of chemical parameters in the test solution (5.2.2.1.3.2) in accordance with the
following methods:
Cd, Ni and Pb: in accordance with ISO 8288, Method A;
Cr: in accordance with EN 1233;
As, Se and Sb: in accordance with the method given in Annex C.
These methods will give an interim result (y) expressed in milligrams per litre that needs to be corrected to
give the final concentration according to the equation in 5.2.2.1.4.
5.2.2.1.4 Expression of results
From the interim results (y) determined (see 5.2.2.1.3.3), the content, C2, of each chemical parameter in the
laboratory sample, expressed in milligrams per kilogram of sodium hydrogen sulfate is given by the following
equation (4):
V 100
C = y • • (4)
2
m C
1
where
Y is the interim result (5.2.2.1.3.3);
V is the volume, expressed in millilitres, of the test solution (5.2.2.1.3.2) (= 100 ml);
M is the mass, expressed in grams, of the test portion;
C1 is the sodium hydrogen sulfate content in percentage by mass of product (see 5.2.1.5).
5.2.3.2 Determination of the mercury (Hg)
5.2.3.2.1 Principle
The element mercury is determined by flameless atomic absorption spectrometry in accordance with
EN 1483.
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5.2.3.2.2 Reagents
All reagents shall be of a recognized analytical grade and the water used shall conform to grade 2 specified in
EN ISO 3696.
5.2.3.2.2.1 Potassium permanganate solution, c(KMnO ) = 50 g/L.
4
5.2.3.2.2.2 Sulfuric acid, concentrated, density 〉 = 1,84 g/mL.
5.2.3.2.2.3 Hydroxylammonium chloride solution, c(NH OH · HCl) = 100 g/L.
2
5.2.3.2.2.4 Potassium dichromate solution, c(K Cr O ) = 4 g/L in 50 % (V/V) nitric acid solution.
2 2 7
5.2.3.2.3 Procedure
5.2.3.2.3.1 Test portion
Weigh, to the nearest 0,01 g, 10 g (m ) of the laboratory sample, into a glass beaker.
2
5.2.3.2.3.2 Test solution
Quantitatively transfer the test portion to a 100 mL (V1) volumetric flask. Dilute with water to the mark and mix
(solution A).
Pipette, accurately 10 mL of the solution A. Transfer to a 250 mL conical flask and add 60 mL of water, 20 mL
of a potassium permanganate solution (5.2.2.2.2.1) and five 1 mL portions of sulfuric acid (5.2.2.2.2.2). Heat
and keep boiling for 10 min. Allow to cool. Just dissolve the precipitate (MnO2) with hydroxylammonium
chloride (5.2.2.2.2.3), add 5 mL of the potassium dichromate solution (5.2.2.2.2.4) and transfer to a 100 mL
(V2) volumetric flask. Dilute to the mark with water and mix.
5.2.3.2.3.3 Determination
Proceed as described in EN 1483.
5.2.3.2.4 Expression of result
The interim result for mercury content (y) expressed in milligrams per litre is given by the following equation
(5):
V
2
y = y • (5)
A
10
where
yA is the result obtained in 5.2.2.2.3.3, for the concentration of mercury in the test solution, expressed in
milligrams per litre ;
V2 is the volume in millilitres of the test solution.
The mercury content, C3, in milligrams per kilogram of sodium hydrogen sulfate is given by the following
equation (6):
V 100
C = y • • (6)
3
m C
2 1
where
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y is the previously determined interim result for mercury content;
V1 is the volume, in millilitres, of the solution A ( see 5.2.2.2.3.2);
m2 is the mass, expressed in grams, of the test portion (5.2.2.2.3.1);
C1 is the sodium hydrogen sulfate content in percent by mass (see 5.2.1.5).
6 Labelling – Transportation – Storage
6.1 Means of delivery
Sodium hydrogen sulfate shall be delivered in polyethylene bags, with net contents of 25 kg, or in flexible bulk
containers, with net contents of max. 1 000 kg.
In order that the purity of the product is not affected, the means of delivery shall not have been used
previously for any different product or it shall have been specially cleaned and prepared before use.
4)
6.2 Risk and safety labelling according to the EU Regulation
At the date of publication of this standard, the following labelling requirements shall apply to sodium hydrogen
sulfate:
Pictogram and signal word:
GHS05 :Danger
Hazard statements:
H318: Causes serious eye damage
Precautionary statements:
P102: Keep out of reach of children.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact
lenses, if present and easy to do. Continue rinsing.
P310: Immediately call a POISON CENTER or doctor/physician.
NOTE The regulation [2] contains a list of substances classified by the EU. Substances not listed in this regulation
should be classified on the basis of their intrinsic properties according to the criteria in the regulation by the person
responsible for the marketing of the substance.
6.3 Transportation regulations and labelling
5)
At the date of publication of the standard, Sodium hydrogen sulfate is not listed as UN Number and not
6 7
classified by the manufacturers as a dangerous good according to the transport regulations RID , ADR ,
8 9
IMDG and IATA .
4
See [2].
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6.4 Marking
The marking shall include the following:
the name: “sodium hydrogen sulfate”, trade name and grade;
the net mass;
the name and address of supplier and/or manufacturer;
the statement “This product conforms to EN XXX, type .”.
6.5 Storage
6.5.1 General
Store the product in original packages or in tightly closed plastic containers in a cool and dry place. Do not use
containers made of common construction metals (mild steel, stainless steel, zinc coated steel, etc.). Keep
away from any sources of heat (avoid heat of > 60 °C to prevent agglomeration) or incompatible materials.
6.5.2 Long term stability
Stable when stored under conditions described in 6.5.1.
6.5.3 Storage incompatibilities
Avoid contact with alkaline substances (intense reaction). Avoid contact with common construction metals
(corrosion, release of highly flammable hydrogen gas).
Avoid mixtures with hypochlorites and other compounds containing active chlorine (intense reaction, release
of toxic chlorine gas).
5
United Nations Number.
6
Regulations concerning the International Carriage of Dangerous Goods by Rail.
7
European Agreement concerning the International Carriage of Dangerous Goods by Road.
8
International Maritime Transport of Dangerous Goods Code.
9
International Air Transport Association. Dangerous Goods Regulations
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Annex A
(informative)
General information on sodium hydrogen sulfate
A.1 Origin
A.1.1 Raw materials
Sodium hydrogen sulfate is usually manufactured from sulfuric acid and sodium chloride. Furthermore it can
be made of sulfuric acid and sodium sulfate, or of sulfuric acid and sodium hydroxide or of sulfuric acid and
sodium carbonate.
A.1.2 Manufacturing process
The usual manufacturing process is the reaction of solid sodium chloride (salt) or sodium sulfate with
equivalent amounts of concentrated sulfuric acid under heating according to the reaction equations:
H SO + NaCl → NaHSO + HCl (A.1)
2 4 4
H SO + Na SO → 2 NaHSO (A.2)
2 4 2 4 4
A.2 Use
A.2.1 Function
It is most commonly used for adjustment of pH value. Other uses include generation of chlorine dioxide by
acidification of sodium chlorite, regeneration of adsorbents and ion exchange resins.
A.2.2 Form in which it is used
The product is used as aqueous solution containing 20 g/L to 200 g/L of NaHSO .
4
A.2.3 Treatment dose
The dose depends of the application and water quality objectives.
The treatment dose should be such that limits for sodium and sulfate ions in the drinking water are not
exceeded.
A.2.4 Means of application
The aqueous solution of the product is usually applied using a metering pump.
A.2.5 Secondary effects
Lowering of the pH value of the treated water, increasing the concentration of sodium and sulfate ions.
A.2.6 Removal of excess product
Addition of alkaline agents (e.g. sodium hydrogen carbonate) is used to neutralize the excess acidity
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Annex B
(normative)
General rules relating to safety
B.1 Rules for safe handling and use
The supplier shall provide current safety instructions.
B.2 Emergency procedures
B.2.1 First aid
Skin: wash thoroughly with plenty of water and soap.
Eyes: rinse immediately and thoroughly with plenty of water for at least 15 min and seek medical advice.
Inhalation: remove person to fresh air, if breathing is difficult seek medical help immediately.
Ingestion: give plenty of water to drink. Do not induce vomiting. Seek medical advice.
B.2.2 Spillage
Sweep up and collect in plastics containers (no metallic containers). Observe local waste disposal regulations.
Rinse residues away with plenty of water. Clean contaminated tools with plenty of water.
B.2.3 Fire
Product itself does not burn. Cool endangered containers with water spray jet. Adapt extinguishing measure to
the surrounding fire as foam, carbon dioxide, dry powder. Do not use water.
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Annex C
(normative)
Determination of arsenic, antimony and selenium (atomic absorption
spectrometry hydride technique)
SAFETY PRECAUTIONS — Arsenic, antimony and selenium and their hydrides are toxic. Handle with
care.
C.1 General principle
Arsenious acid, antimonic acid and selenious acid, the As(III), Sb(III) and Se(IV) oxidation states of arsenic,
antimony and selenium, respectively, are instantaneously converted by sodium borohydride reagent in acid
solution to their volatile hydrides. The hydrides are purged continuously by argon or nitrogen into an
appropriate atomizer of an atomic absorption spectrometer and converted to the gas-phase atoms. The
sodium borohydride reducing agent, by rapid generation of the elemental hydrides in an appropriate reaction
cell, minimizes dilution of the hydrides by the carrier gas and provides rapid, sensitive determinations of
arsenic, antimony and selenium.
The sample is digested to solubilize particulate As, Sb and Se. The digested solutions are treated separately
for determinati
...
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