SIST EN 973:2009
(Main)Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers
Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers
This European Standard is applicable to sodium chloride intended for use only in water treatment apparatus, for the regeneration of ion exchangers, intended for water for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride. It gives information on its use in water treatment.
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumchlorid zum Regenerieren von lonenaustauschern
Diese Europäische Norm gilt für Natriumchlorid für den ausschließlichen Einsatz in Anlagen zur Aufbereitung
von Wasser für den menschlichen Gebrauch bzw. zur Behandlung von Trinkwasser zum Regenerieren von
Ionenaustauschern. Sie beschreibt die Eigenschaften und legt die Anforderungen sowie die entsprechenden
Prüfverfahren für Natriumchlorid fest. Sie enthält Angaben zu dessen Anwendung in der Wasseraufbereitung.
Produits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Chlorure de sodium pour la régénération des résines échangeuses d'ions
Cette Norme européenne est applicable au chlorure de sodium utilisé uniquement dans l’appareillage de
traitement de l’eau destinée à la consommation humaine, pour la régénération des résines échangeuses
d’ions. Elle décrit les caractéristiques et spécifie les exigences et les méthodes d’essai correspondantes du
chlorure de sodium. Elle donne des informations pour son emploi dans le traitement de l’eau.
Kemikalije, ki se uporabljajo za pripravo pitne vode - Natrijev klorid za regeneracijo ionskih izmenjevalnikov
General Information
Relations
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 klorid za regeneracijo ionskih izmenjevalnikovProdukte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumchlorid zum Regenerieren von lonenaustauschernProduits chimiques utilisés pour le traitement de l'eau destinée à la consommation humaine - Chlorure de sodium pour la régénération des résines échangeuses d'ionsChemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 973:2009SIST EN 973:2009en,fr,de01-december-2009SIST EN 973:2009SLOVENSKI
STANDARDSIST EN 973:2002/A1:2003SIST EN 973:20021DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 973August 2009ICS 71.100.80Supersedes EN 973:2002
English VersionChemicals used for treatment of water intended for humanconsumption - Sodium chloride for regeneration of ionexchangersProduits chimiques utilisés pour le traitement de l'eaudestinée à la consommation humaine - Chlorure de sodiumpour la régénération des résines échangeuses d'ionsProdukte zur Aufbereitung von Wasser für denmenschlichen Gebrauch - Natriumchlorid zumRegenerieren von lonenaustauschernThis European Standard was approved by CEN on 23 July 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 973:2009: ESIST EN 973:2009
2 Contents page Foreword . 3Introduction . 41Scope . 52Normative references . 53Description . 53.1Identification . 53.2Commercial forms . 63.3Physical properties . 63.4Chemical properties . 84Purity criteria . 84.1General . 84.2Composition of commercial product . 84.3Impurities and main by-products . 84.4Chemical parameters . 95Test methods . 95.1Sampling . 95.2Analyses . 96Labelling – Transportation - Storage . 106.1Means of delivery . 106.2Risk and safety labelling in accordance with the EU directives
............................................................ 106.3Transportation regulations and labelling .................................................................................................. 106.4Marking ......................................................................................................................................................... 106.5Storage .......................................................................................................................................................... 11Annex A (informative)
General information on sodium chloride . 12A.1Origin . 12A.2Use . 12A.3Rules for safe handling and use . 12A.4Emergency procedures . 12Annex B (normative)
Analytical methods . 14B.1Determination of antimony, arsenic, cadmium, chromium, lead, nickel and selenium
(inductively coupled plasma optical emission spectrometry (ICP/OES)) . 14B.2Determination of total mercury (cold vapour atomic absorption spectrometry) . 18B.3Determination of water-soluble hexacyanoferrate (II) (molecular absorption spectrometry) . 23B.4Determination of potassium (Flame atomic absorption spectrometric method) . 27Annex C (informative)
Determination of cadmium, chromium, nickel and lead (flame atomic
absorption spectrometry . 30 C.1Determination of cadmium . 30C.2Determination of chromium . 34C.3Determination of nickel . 37C.4Determination of lead . 40Annex D (informative)
Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) . 45D.1General principle. 45D.2Interferences . 45D.3Reagents . 45D.4Apparatus . 47D.5Procedure . 48D.6Calculation . 50Bibliography . 51 SIST EN 973:2009
3 Foreword This document (EN 973:2009) 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 February 2010, and conflicting national standards shall be withdrawn at the latest by February 2010. 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. This document supersedes EN 973:2002. Differences between this edition and EN 973:2002 are editorial to harmonise the text with other standards in this series. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 the United Kingdom. SIST EN 973:2009
4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: a) this 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 the 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 973:2009
5 1 Scope This European Standard is applicable to sodium chloride intended for use only in water treatment apparatus, for the regeneration of ion exchangers, intended for water for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride. 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 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 2480, Sodium chloride for industrial use – Determination of sulphate content – Barium sulphate gravimetric method ISO 2482, Sodium chloride for industrial use – Determination of calcium and magnesium contents – EDTA complexometric methods ISO 2483, Sodium chloride for industrial use – Determination of the loss of mass at 110 °C ISO 3165, Sampling of chemical products for industrial use - Safety in sampling ISO 6206, Chemical products for industrial use – Sampling – Vocabulary ISO 6227, Chemical products for industrial use – General method for determination of chloride ions – Potentiometric method ISO 8213, Chemical products for industrial use – Sampling techniques – Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Sodium chloride. 3.1.2 Synonym or common name Salt. 3.1.3 Relative molecular mass 58,45. 3.1.4 Empirical formula NaCl. SIST EN 973:2009
6 3.1.5 Chemical formula NaCl. 3.1.6 CAS Registry Number1
7647-14-5. 3.1.7 EINECS Reference2
231-598-3. 3.2 Commercial forms The product is available as rock salt, sea salt or evaporated salt, and it is supplied as free-flowing crystals or their compacted forms. 3.3 Physical properties 3.3.1 Appearance The product is white and crystalline. 3.3.2 Density The density of the solid crystal is 2,16 g/cm3 at 20 °C. The bulk density depends on the particle size distribution. 3.3.3 Solubility (in water) The solubility of the product depends on the temperature as given in Figure 1.
1 Chemical Abstract Service Registry Number. 2 European Inventory of Existing Commercial Chemical Substances. SIST EN 973:2009
Key 1 Transition point
NaCl Æ NaCl.2H2O Figure 1 - Solubility curve for sodi
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