IEC 62321-7-2:2017

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.
It has the status of a horizontal standard in accordance with IEC Guide 108 .

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 la 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.
Elle a le statut de norme horizontale conformément au Guide IEC 108.

General Information

• Status: Published
• Publication Date: 27-Mar-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.020 - Electronic components in general
• ICS: 71.040.50 - Physicochemical methods of analysis
• Technical Committee: TC 111 - Environmental standardization for electrical and electronic products and systems
• Drafting Committee: WG 3 - TC 111/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 27-Mar-2017
• Completion Date: 28-Mar-2017

Standards Content (Sample)

IEC 62321-7-2 ®
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL STANDARD
NORME HORIZONTALE
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

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IEC 62321-7-2 ®
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL STANDARD
NORME HORIZONTALE
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 × s . 16
n–1
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
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