GB/T 41525-2022 英文版 玩具材料中可遷移六價(jià)鉻的測(cè)定 離子色譜法

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GB/T 41525-2022 英文版

Contents

Foreword II
1 ?Scope 1
2 ?Normative references 1
3 ?Terms and definitions 1
4 ?Principle 1
5 ?Reagents 1
6 ?Instruments 2
7 ?Classification of toy materials 2
8 ?Sampling and sample preparation 3
9 ?Migration test 3
10 ?pH adjustment of migration solution 3
11 ?Analysis 3
12 ?Blank test 4
13 ?Calculation of results 4
14 ?Quality control 5
15 ?Test report 5
Annex A (Informative) ?Test conditions 6
Annex B (Informative) ?Precision 9

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Foreword

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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by the China National Light Industry Council.

This standard is under the jurisdiction of SAC/TC 253 National Technical Committee on Toys of Standardization Administration of China.

Determination of migratable chromium (VI) in toy materials - Ion chromatography

WARNING - Persons using this document shall be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.

1 ?Scope

This document specifies the method for determining the content of migratable chromium (VI) [Cr(VI)] in toy materials using ion chromatography.

This document is applicable to the following accessible toy materials:

——Category I: dry, fragile, powdery or flexible toy materials;

——Category II: liquid or sticky toy materials;

——Category III: scrapable toy materials.

2 ?Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6682 Water for analytical laboratory use - Specification and test methods
EN 71-3 Safety of toys - Part 3: Migration of certain elements

3 ?Terms and definitions

For the purposes of this document, the terms and definitions given in EN 71-3 apply.

4 ?Principle

Migratable chromium [Cr(VI)] is dissolved matter Cr(VI) extracted from toy materials by simulating the continuous contact between toy materials and gastric acid for a period of time after swallowing. In this document, Cr(VI) will produce a purple-red complex after being separated by anion exchange column and mixed with the post-column derivant under certain pH conditions, which is determined by UV-Vis detector and quantified by external standard method.