EN 12120:2005
(Main)Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
This European Standard is applicable to sodium hydrogen sulphite used for treatment of water intended for human consumption. It describes the characteristics of sodium hydrogen sulphite and specifies the requirements and the corresponding test methods for sodium hydrogen sulphite. It gives information on its use in water treatment.
Produkt zue Aufbereitung von Wasser den menschlichen Gebrauch - Natriumhydrogensulfit
Diese Europäische Norm gilt für Natriumhydrogensulfit zur Aufbereitung von Wasser für den menschlichen
Gebrauch. Sie beschreibt die Eigenschaften von Natriumhydrogensulfit und legt die Anforderungen sowie die
entsprechenden Prüfverfahren für Natriumhydrogensulfit fest. Sie gibt Informationen für die Anwendung von
Natriumhydrogensulfit in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulfite de sodium
La présente norme européenne est applicable à l'hydrogénosulfite de sodium utilisé pour le traitement de l'eau destinée à la consommation humaine. Elle décrit les caractéristiques de l'hydrogénosulfite de sodium et spécifie les prescriptions et les méthodes d'essai correspondant à l'hydrogénosulfite de sodium. Elle donne des informations pour son emploi dans le traitement de l'eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev hidrogen sulfit
General Information
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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 sulfitProdukt zue Aufbereitung von Wasser den menschlichen Gebrauch - NatriumhydrogensulfitProduits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Hydrogénosulfite de sodiumChemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 12120:2005SIST EN 12120:2005en01-september-2005SIST EN 12120:2005SLOVENSKI
STANDARDSIST EN 12120:20001DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12120
June 2005 ICS 71.100.80
Supersedes EN 12120:1998
English version
Chemicals used for treatment of water intended for human consumption - Sodium hydrogen sulfite
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Hydrogénosulphite de sodium
Produkt zue Aufbereitung von Wasser den menschlichen Gebrauch - Natriumhydrogensulfit This European Standard was approved by CEN on 12 May 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12120:2005: ESIST EN 12120:2005
General information on sodium hydrogen sulfite.18 Bibliography.20
in order to take into account the latest Directive in force (see [1]). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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 ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) ISO 418, Photography - Processing chemicals - Specifications for anhydrous sodium sulfite ISO 3165, Sampling of chemical products for industrial use - Safety in sampling ISO 5993, Sodium hydroxide for industrial use - Determination of mercury content - Flameless atomic absorption spectrometric method ISO 6206, Chemical products for industrial use - Sampling – Vocabulary ISO 6353-1, Reagents for chemical analysis - Part 1: General test methods ISO 9297, Water quality - Determination of chloride - Silver nitrate titration with chromate indicator (Mohr's method) ISO 22743 (in preparation) Water quality -- Determination of sulfates by continuous flow analysis (CFA) 3 Description 3.1 Identification 3.1.1 Chemical name Sodium hydrogen sulfite. 3.1.2 Synonym or commons name Sodium bisulfite 3.1.3 Relative molecular mass 104,6 3.1.4 Empirical formula NaHSO3. 3.1.5 Chemical formula NaHSO3. SIST EN 12120:2005
The product decomposes at 100 °C.
3.3.6 Crystallisation point A solution of mass fraction of 40 % NaHSO3 crystallizes at 2 °C. 3.3.7 Specific heat The specific heat of the product is 3,15 kJ/kg.K . 3.3.8 Viscosity dynamic The viscosity of a solution of mass fraction of 40% NaHSO3 is 4 mPa.s at 25 °C. 3.3.9 Critical temperature Not applicable.
1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances.
3) 100 kPa = 1 bar. SIST EN 12120:2005
mg/kg of commercial product (mass fraction of 40 % NaHSO3
Antimony (Sb) max. 1 Arsenic (As) max. 1 Cadmium (Cd) max. 1 Chromium (Cr) max. 1 Lead (Pb) max. 5 Mercury (Hg) max. 1 Nickel (Ni) max. 1 Selenium (Se) max. 1 NOTE Other chemical parameters and indicator parameters are not relevant in sodium hydrogen sulfite because the raw materials used in the manufacturing process are free of them. For parametric values of sodium hydrogen sulfite on trace metal content in drinking water, see [1]. 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations of ISO 3165 and take account of ISO 6206. 5.1.2 Sampling from drums and bottles 5.1.2.1 General 5.1.2.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.2.1.2
If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.2.1.3. 5.1.2.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.2.2. Otherwise, take samples as described in 5.1.2.3. 5.1.2.2 Surface sampling Take a sample using a suitable ladle. Lower the ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladle just before it fills completely and allow any liquid adhering to the SIST EN 12120:2005
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