EN 62321-7-2:2017
(Main)Determination of certain substances in electrotechnical products - Part 7-2: Hexavalent chromium - Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method
Determination of certain substances in electrotechnical products - Part 7-2: Hexavalent chromium - Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method
IEC 62321-7-2:2017 describes procedures to measure hexavalent chromium, Cr(VI), quantitatively in samples of polymers and electronics. This method employs organic solvent to dissolve or swell the sample matrix, followed by an alkaline digestion procedure to extract Cr(VI) from samples. Studies have shown that organic/alkaline solution is more effective than acidic solution in extracting Cr(VI) from soluble and insoluble samples. Minimal reduction of Cr(VI) to Cr(III) or oxidation of Cr(III) to Cr(VI) occurs under alkaline conditions. The first edition of IEC 62321:2008 was a ‘stand-alone’ standard that included an introduction, an overview of test methods, a mechanical sample preparation as well as various test method clauses. This first edition of IEC 62321-7-2 is a partial replacement of IEC 62321:2008, forming a structural revision and generally replacing Annex C. IEC 62321-7-2 is the final replacement part of the corresponding clauses in IEC 62321:2008.
Verfahren zur Bestimmung von bestimmten Substanzen in Produkten der Elektrotechnik - Teil 7-2: Sechswertiges Chrom - Bestimmung von sechswertigem Chrom (Cr(VI)) in Polymeren und Elektronik durch das kolorimetrische Verfahren
Détermination de certaines substances dans les produits électrotechniques - Partie 7-2: Chrome hexavalent - Détermination du chrome hexavalent (Cr(VI)) dans les polymères et les produits électroniques par méthode colorimétrique
l'IEC 62321-7-2:2017 décrit des procédures de mesure quantitative du chrome hexavalent, Cr(VI), dans des échantillons de polymères et de produits électroniques. Cette méthode emploie un solvant organique destiné à dissoudre ou à faire gonfler la matrice de l'échantillon, puis une procédure de digestion alcaline visant à extraire le chrome hexavalent des échantillons. Des études ont démontré que la solution alcaline/organique est plus efficace que la solution acide pour extraire le Cr(VI) d'échantillons solubles et insolubles. La réduction minimale du Cr(VI) en Cr(III) ou l'oxydation du Cr(III) en Cr(VI) se produit en milieu alcalin. La première édition de l'IEC 62321:2008 était une norme "autonome" qui comprenait une introduction, une vue d'ensemble des méthodes d'essai, la préparation mécanique d'échantillon, ainsi que différents articles relatifs à des méthodes d'essai. Cette première édition de l'IEC 62321-7-2 remplace en partie l'IEC 62321:2008, constituant une révision structurelle et remplaçant, en général, l'Annexe C. L'IEC 62321-7-2 remplace définitivement les articles correspondants dans l'IEC 62321:2008.
Določevanje posameznih substanc v elektrotehniških izdelkih - 7-2. del: Šestvalentni krom - Določevanje šestvalentnega kroma (Cr(VI)) v polimerih in elektroniki s kolorimetrično metodo
Ta del IEC 62321 opisuje postopke za količinsko merjenje šestvalentnega kroma (Cr(VI)) v vzorcih polimerov in elektronike. Metoda določa uporabo organskega topila, s katerim se matrica vzorca raztopi ali nabrekne, temu pa sledi postopek alkalnega razklopa za izločanje Cr(VI) iz vzorcev. Študije so pokazale, da je organska/alkalna raztopina učinkovitejša od kisle raztopine pri izločanju Cr(VI) iz topnih in netopnih vzorcev. Minimalna redukcija Cr(VI) v Cr(III) ali oksidacija Cr(III) v Cr(VI) se pojavi pri alkalnih pogojih.
Pri topnih polimerih, sestavljenih iz akrilonitril-butadienstirena (ABS), polikarbonata (PC) in polivinilklorida (PVC), je treba vzorce najprej raztopiti v ustreznem organskem topilu in nato izločiti Cr(VI) z alkalno raztopino za izločanje.
Pri netopnih/neznanih polimerih ali elektronskih materialih, ki ne vsebujejo antimona (Sb), je treba vzorce obdelati v raztopini toluena/alkalni raztopini pri 150–160 °C. Nato je treba ločiti in zavreči organsko fazo v ekstraktih, anorgansko fazo pa ohraniti za analizo Cr(VI).
Koncentracija Cr(VI) v ekstraktu se določi glede na njeno reakcijo v kislih pogojih z 1,5-difenilkarbazidom. Cr(VI) je reduciran v Cr(III) v reakciji z difenilkarbazidom, ki oksidira v difenilkarbazon. Cr(III) in difenilkarbazon v reakciji tvorita rdečevijolični sestav. Raztopina se meri kvantitativno s kolorimetrom ali spektrofotometrom pri 540 nm.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Determination of certain substances in electrotechnical products - Part 7-2: Hexavalent chromium - Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method71.040.50Fizikalnokemijske analitske metodePhysicochemical methods of analysis31.020Elektronske komponente na splošnoElectronic components in general29.020Elektrotehnika na splošnoElectrical engineering in generalICS:Ta slovenski standard je istoveten z:EN 62321-7-2:2017SIST EN 62321-7-2:2017en01-september-2017SIST EN 62321-7-2:2017SLOVENSKI
STANDARDSIST EN 62321:20091DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62321-7-2
June 2017 ICS 31.020; 71.040.50
Supersedes
EN 62321:2009 (partially)
English Version
Determination of certain substances in electrotechnical products - Part 7-2: Hexavalent chromium - Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method (IEC 62321-7-2:2017)
Détermination de certaines substances dans les produits électrotechniques - Partie 7-2: Chrome hexavalent - Détermination du chrome hexavalent (Cr(VI)) dans les polymères et les produits électroniques par méthode colorimétrique (IEC 62321-7-2:2017)
Verfahren zur Bestimmung von bestimmten Substanzen in Produkten der Elektrotechnik - Teil 7-2: Bestimmung von sechswertigem Chrom (Cr(VI)) in Polymeren und Elektronik durch kolorimetrische Verfahren (IEC 62321-7-2:2017) This European Standard was approved by CENELEC on 2017-05-02. CENELEC 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 CEN-CENELEC Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62321-7-2:2017 E SIST EN 62321-7-2:2017
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-02-02 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2020-05-02
This document supersedes EN 62321:2009 (partially).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 62321-7-2.2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 62321:2008 NOTE Harmonized as EN 62321:2009. IEC 62321-2 NOTE Harmonized as EN 62321-2. ISO 648 NOTE Harmonized as EN ISO 648.
Annex ZA (normative)
Normative references to international publications with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year IEC 62321-1 -
Determination of certain substances in electrotechnical products -- Part 1: Introduction and overview EN 62321-1 -
ISO 3696 -
Water for analytical laboratory use - Specification and test methods EN ISO 3696 -
IEC 62321-7-2 Edition 1.0 2017-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Determination of certain substances in electrotechnical products –
Part 7-2: Hexavalent chromium – Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method
Détermination de certaines substances dans les produits électrotechniques –
Partie 7-2: Chrome hexavalent – Détermination du chrome hexavalent (Cr(VI)) dans les polymères et les produits électroniques par méthode colorimétrique
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 31.020; 71.040.50
ISBN 978-2-8322-4085-4
– 2 – IEC 62321-7-2:2017 IEC 2017
CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms, definitions and abbreviated terms . 6 3.1 Terms and definitions . 6 3.2 Abbreviated terms . 7 4 Reagents . 7 4.1 General . 7 4.2 Reagents . 7 5 Apparatus . 8 5.1 General . 8 5.2 Apparatus . 8 6 Sampling . 9 7 Test procedure . 9 7.1 Extraction of Cr(VI) in soluble polymers – ABS, PC and PVC matrixes . 9 7.2 Extraction of Cr(VI) in insoluble/unknown polymers and electronics − without Sb . 10 8 Calibration . 11 8.1 Permanent calibration instruments . 11 8.2 Traditional calibration instruments . 11 8.2.1 General . 11 9 Calculation . 12 10 Precision . 13 11 Quality assurance and control . 14 11.1 General method . 14 11.2 Matrix spike recovery correction method . 14 12 Limits of detection (LOD) and limits of quantification (LOQ) . 14 12.1 General . 14 12.2 Determination of LOD and LOQ . 15 13 Test report . 16 Bibliography . 17
Table 1 – Statistical data of all IIS trails . 13 Table 2 – Method detection limit = t=×=sn–1 . 16
IEC 62321-7-2:2017 IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
DETERMINATION OF CERTAIN SUBSTANCES
IN ELECTROTECHNICAL PRODUCTS –
Part 7-2: Hexavalent chromium – Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62321-7-2 has been prepared by IEC technical committee 111: Environmental standardization for electrical and electronic products and systems. The first edition of IEC 62321:2008 was a ‘stand-alone’ standard that included an introduction, an overview of test methods, a mechanical sample preparation as well as various test method clauses. This first edition of IEC 62321-7-2 is a partial replacement of IEC 62321:2008, forming a structural revision and generally replacing Annex C. IEC 62321-7-2 is the final replacement part of the corresponding clauses in IEC 62321:2008. SIST EN 62321-7-2:2017
– 4 – IEC 62321-7-2:2017 IEC 2017 The text of this standard is based on the following documents: CDV Report on voting 111/408/CDV 111/432/RVC
Full information on the voting for the approval of
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