1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 12846:2012Water quality Determination of mercury Method using atomic absorption spectrometry (AAS) with and without enrichmentBS EN ISO 12846:2012Incorporating corrigen
2、dum June 2012BS EN ISO 12846:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation ofEN ISO 12846:2012.The UK participation in its preparation was entrusted to TechnicalCommittee EH/3/2, Physical chemical and biochemical methods.A list of organizations represented on t
3、his committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 66230 0 ICS
4、13.060.50 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN ISO 12846:2012 BRITISH STANDARDNa
5、tional forewordThis British Standard is the UK implementation ofEN ISO 12846:2012.The UK participation in its preparation was entrusted to TechnicalCommittee EH/3/2, Physical chemical and biochemical methods.A list of organizations represented on this committee can beobtained on request to its secre
6、tary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 66230 0 ICS 13.060.50 Compliance with a British Standard cannot
7、confer immunity from legal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 12846:2012794 7 7I : . It supersedes BS EN 12338:1998 andBS EN 14
8、83:2007, which are withdrawn.The UK participation in ts preparation was entrusted by TechnicalCommittee EH/3, Water quality, to Subcommittee EH/3/2, Physicalchemical and biochemical methods.i r s t t is subcommittee can bei i s s cr t ry./corrigenda iss ed since publication30 June 2012 Implementatio
9、n of CEN correction notice 30 May2012: Correction to supersession detailsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12846 April 2012 ICS 13.060.50 English Version Water quality - Determination of mercury - Method using atomic absorption spectrometry (AAS) with and without enrichment (I
10、SO 12846:2012) Qualit de leau - Dosage du mercure - Mthode par spectromtrie dabsorption atomique (SAA) avec et sans enrichissement (ISO 12846:2012) Wasserbeschaffenheit - Bestimmung von Quecksilber - Verfahren mittels Atomabsorptionsspektrometrie (AAS) mit und ohne Anreicherung (ISO 12846:2012) This
11、 European Standard was approved by CEN on 14 April 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 reference
12、s 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 mem
13、ber 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, France, Germany, Greece, Hungary, Iceland
14、, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: A
15、venue 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 ISO 12846:2012: ESupersedes EN 12338:1998, EN 1483:2007BS EN ISO 12846:2012EN ISO 12846:2012 (E) 3 Foreword This document (EN ISO 12846:2012) has
16、 been prepared by Technical Committee ISO/TC 147 “Water quality”in collaboration with Technical Committee CEN/TC 230 “Water analysis” the secretariat of which is held byDIN. This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endor
17、sement, at the latest by October 2012, and conflicting national standards shall be withdrawn atthe latest by October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. CEN and/or CENELEC shall not be held responsible for identif
18、ying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany,
19、 Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12846:2012 has been approved by CEN as a EN ISO 12846:2012
20、without any modification. BS EN ISO 12846:2012EN ISO 12846:2012 (E) 3 Foreword This document (EN ISO 12846:2012) has been prepared by Technical Committee ISO/TC 147 “Water quality”in collaboration with Technical Committee CEN/TC 230 “Water analysis” the secretariat of which is held byDIN. This Europ
21、ean Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by October 2012, and conflicting national standards shall be withdrawn atthe latest by October 2012. Attention is drawn to the possibility that some of the elemen
22、ts of this document may be the subject of patentrights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/C NELEC Internal Regulations, the national stand rds organizations of the followingcountries are bound to implement this Europe
23、an Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hu g ry, Icel d, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Net erlands, Norw y, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,Sweden, Switzerland, Turkey and
24、 the United Kingdo . Endorsement notice The text of ISO 12846:2012 has been approved by CEN as a EN ISO 12846:2012 without any modification. BS EN ISO 12846:2012EN ISO 12846:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
25、(ISO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, gov
26、ernmental andnon-governmental, in liaison with ISO, also take art in the work. ISO collaborates closely with the Int rnationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.I tern ti n l Standards are drafted in accordance with the rul s given in the ISO/IEC Dir
27、ectives, Part 2.The main task of technical committees is to prepare I ternational St ndards. Draft International Standardsadopt d y the echnical committees ar circ lated to he member bodies for voting. Publication as anInternational Standard requir s approval by at least 75 % of the member bodies ca
28、sting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO sh ll ot be held responsible f r identifying any or all such patent rights.ISO 12846 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2,
29、 Physical,chemical and biochemical methods.This first edition of ISO 12846 cancels and replaces the editions (ISO 5666:1999, ISO 16590:2000), whichhave been technically revised.iv ISO 2012 All rights reservedThis document supersedes N 1483:2007, EN 12338:1998.BS EN ISO 12846:2012ISO 12846:2012(E) IS
30、O 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references . 13 Principle . 24 General interferences . 25 Sample collection and pre-treatment for drinking, surface, ground and rain-water samples . 36 Determination of mercury after tin(II) chloride reduction a
31、nd enrichment by amalgamation . 46.1 Reagents and standards . 46.2 Apparatus and instrumentation . 66.3 Instrumental set-up . 86.4 Procedure 86.5 Calculation 97 Determination of mercury after tin(II) chloride reduction without enrichment . 97.1 Reagents and standards . 97.2 Apparatus and instrumenta
32、tion . 97.3 Sample collection and pre-treatment for drinking, surface, ground and rain-water samples . 107.4 Sample collection and pre-treatment for waste-water samples .107.5 Instrumental set-up .107.6 Procedure 107.7 Calculation 118 Expression of results . 119 Test report . 11Annex A (informative)
33、 Performance data .12Bibliography .15BS EN ISO 12846:2012ISO 12846:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO tec
34、hnical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closel
35、y with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft In
36、ternational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document m
37、ay be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 12846 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods.This first edition of ISO 12846 cancels and repla
38、ces the editions (ISO 5666:1999, ISO 16590:2000), which have been technically revised.iv ISO 2012 All rights reservedBS EN ISO 12846:2012ISO 12846:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The w
39、ork of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-govern
40、mental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The m
41、ain task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.At
42、tention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 12846 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, ch
43、emical and biochemical methods.This first edition of ISO 12846 cancels and replaces the editions (ISO 5666:1999, ISO 16590:2000), which have been technically revised.iv ISO 2012 All rights reservedBS EN ISO 12846:2012ISO 12846:2012(E)ForewordISO (the International Organization for Standardization) i
44、s a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represe
45、nted on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are dr
46、afted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International St
47、andard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 12846 was prepared b
48、y Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical, chemical and biochemical methods.This first edition of ISO 12846 cancels and replaces the editions (ISO 5666:1999, ISO 16590:2000), which have been technically revised.iv ISO 2012 All rights reservedBS EN ISO 12846:2012ISO
49、 12846:2012(E)IntroductionIn natural water sources, mercury compounds generally occur in very low concentrations of less than 0,1 g/l. Higher concentrations may be found, for example, in industrial waste water. Both inorganic and organic compounds of mercury may be present. Mercury can also accumulate in sediments and sludges.In order to fully decompose all of the mercury compounds in the presence of particles in the sample, an additional digestion procedure is necessary. This additional digestion can be omitted only if significant amounts of prev
