【BS英国标准】BS EN 938-2009 Chemicals used for treatment of water intended for human consumption —Sodium chlorite.doc
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1、BRITISH STANDARDBS EN 938:2009Chemicals used fortreatment of water intended for human consumption Sodium chloriteICS 13.060.20; 71.100.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 938:2009National forewordThis British Standard is the UK implementation of EN 938:2009.
2、 It supersedes BS EN 938:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purp
3、ort to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 J
4、une2009. BSI 2009ISBN 978 0 580 58599 9Amendments/corrigenda issued since publicationDate CommentsBS EN 938:2009EUROPEAN STANDARD NORME EUROPENNEEUROPISCHE NORMEN 938January 2009ICS 71.100.80Supersedes EN 938:1999English VersionChemicals used for treatment of water intended for human consumption - S
5、odium chloriteProduits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorite de sodiumProdukte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - NatriumchloritThis European Standard was approved by CEN on 5 December 2008.CEN members are bound to comply with
6、 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 Management Cen
7、tre 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 Management Centre has the same status as the officia
8、l 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, Sloven
9、ia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION C OM I T EUR OP EN DE NOR M AL I S ATI ON EUR OP I S C HES KOM I TEE F R NOR M UNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CENAll rights of exploitation in any form and by any means reserved wo
10、rldwide for CEN national Members.Ref. No. EN 938:2009: EContentsPageForeword. 3Introduction . 41Scope . 52Normative references . 53Description . 53.1Identification . 53.2Commercial form . 63.3Physical properties. 63.4Chemical properties . 74Purity criteria. 84.1General. 84.2Composition of commercial
11、 product . 84.3Impurities and main by-products . 84.4Chemical parameters . 85Test methods . 95.1Sampling . 95.2Analysis . 106Labelling - Transportation - Storage. 206.1Means of delivery. 206.2Risk and safety labelling according to the EU Directives . 206.3Transportation regulations and labelling . 2
12、16.4Marking . 216.5Storage. 21Annex A (informative) General information on sodium chlorite . 22Annex B (normative) General rules relating to safety . 27Annex C (normative) Determination of arsenic, antimony and selenium (atomic absorptionspectrometry hydride technique). 28Bibliography . 3433BS EN 93
13、8:2009EN 938:2009 (E)ForewordThis document (EN 938:2009) 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
14、, at the latest by July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009.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
15、 all such patent rights.This document supersedes EN 938:1999.The significant technical differences between this edition and EN 938:1999 are as follows:a) Deletion of reference to EU Directive 80/778/EEC of July 15, 1980 in order to take into account the latest Directive in force (see 1).b) Replaceme
16、nt of ISO 5666-1 by EN 1483. Annex A is informative.Annexes B and C are normative.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, Denm
17、ark, 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.IntroductionIn respect of potential adverse effects on the qua
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