IEC 62321-7-2:2017 电工产品中某些物质的测定第7-2部分:六价铬 - 用比色法测定聚合物和电子产品中六价铬（Cr（VI））

标准编号：IEC 62321-7-2:2017

中文名称：电工产品中某些物质的测定第7-2部分:六价铬 - 用比色法测定聚合物和电子产品中六价铬（Cr（VI））

英文名称：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

发布日期：2017-03-28

标准范围

IEC 62321-7-2:2017描述了定量测量聚合物和电子产品样品中六价铬（六价铬）的程序。该方法使用有机溶剂溶解或膨胀样品基质，然后通过碱性消化程序从样品中提取Cr（VI）。研究表明，在从可溶性和不溶性样品中提取六价铬时，有机/碱性溶液比酸性溶液更有效。在碱性条件下，Cr（VI）最小程度地还原为Cr（III）或将Cr（III）氧化为Cr（VI）。IEC 62321:2008第一版是一个&lsquo；独立的；标准包括介绍、试验方法概述、机械样品制备以及各种试验方法条款。IEC 62321-7-2的第一版是对IEC 62321:2008的部分替换，形成了结构修订，并通常取代了附录C。IEC 62321-7-2是IEC 62321:2008中相应条款的最终替换部分。

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.

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