ICS 31.020 L 10 GB 中华人民共和国国家标准 GB/T39560.701—2020/IEC62321-7-1:2015 电子电气产品中某些物质的测定 第7-1部分:六价铬比色法测定金属上 无色和有色防腐镀层中的六价铬「CrVI) Determination of certain substances in electrical and electronic products- Part7-1:Hexavalentchromium—Presenceofhexavalentchromium[Cr(VI) in colourless and coloured corrosion-protected coatings on metals by the colorimetric method IEC62321-7-1:2015,Determinationof certain substancesinelectrotechnical products—Part 7-l:Hexavalent chromium-Presence of hexavalent chromium「Cr(Vl)in colourless and coloured corrosion-protected coatings on metals by the colorimetric method, IDTJ 2020-12-14发布 2021-07-01实施 国家市场监督管理总局 发布 国家标准化管理委员会