Determination of certain substances in electrotechnical products - Part 7-1: Determination of the presence of hexavalent chromium (Cr(VI)) in colorless and colored corrosion-protected coatings on metals by the colorimetric method (IEC 62321-7-1:2015); German version EN 62321-7-1:2015
电工产品中某些物质的测定.第7-1部分:用比色法测定无色和有色金属防腐涂层中六价铬(Cr(VI))的含量(IEC 62321-7-1-2015);德文版EN 62321-7-1:2015