BS-EN-12125-2005.pdf
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1、BRITISH STANDARD BS EN 12125:2005 Chemicals used for treatment of water intended for human consumption Sodium thiosulfate The European Standard EN 12125:2005 has the status of a British Standard ICS 71.100.80 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:49:02 GMT+00:00 2006, Uncontrol
2、led Copy, (c) BSI BS EN 12125:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 April 2006 BSI 2006 ISBN 0 580 47480 1 National foreword This British Standard is the official English language version of EN 12125:2005. It supersedes BS E
3、N 12125:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. The United
4、 Kingdom, as a member of CEN, is obliged to publish EN 12125 as a British Standard. However, attention is drawn to the fact that the United Kingdom voted against the approval of EN 12125. The main reason for this disapproval was that no information has been provided on the preparation of the test so
5、lution or the calculation of the result for the determination of sulfate, in order to apply the method referred to in 5.2.2.1 which is intended for the analysis of water. Cross-references The British Standards which implement international or European publications referred to in this document may be
6、 found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are
7、responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and k
8、eep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed
9、 in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:49:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12125 June 2005 ICS
10、 71.100.80 Supersedes EN 12125:1998 English version Chemicals used for treatment of water intended for human consumption - Sodium thiosulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Thiosulfate de sodium Produkte zur Aufbereintung von Wasser fr den men
11、schlichen Gebrauch - Natriumthiosulfat 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
12、-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
13、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, Icela
14、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart,
15、 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 12125:2005: E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:49:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12125:2005 (E) 2 Contents Page For
16、eword3 Introduction.4 1Scope 5 2Normative references5 3Description.5 4Purity criteria7 Table 1 Chemical parameters.8 5Test methods8 Table 2 - Procedures for the determination of chemical parameters9 Figure 1 Calculation of the element concentration in the test solution.11 Figure 2 Calculation of the
17、 element concentration in the blank solution12 Table 3 Standard solution .14 6Labelling Transportation Storage14 Annex A (informative) General information on sodium thiosulfate 16 Bibliography18 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:49:02 GMT+00:00 2006, Uncontrolled Copy, (c) BS
18、I EN 12125:2005 (E) 3 Foreword This European Standard (EN 12125:2005) 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
19、by endorsement, at the latest by December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. This document supersedes EN 12125:1998. Significant technical differences between this edition and EN 12125:1998 are as follows: deletion of the reference to EU Direc
20、tive 80/778/EEC of 15 July 1980 in order to take account of 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 Republi
21、c, 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:49:02 GMT
22、+00:00 2006, Uncontrolled Copy, (c) BSI EN 12125:2005 (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 produc
23、t 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
24、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. Licensed Copy: sheffieldun sheffieldun, na, Sat O
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