DIN EN 62321-7-1-2016 電工技術產品中某些物質的測定.第7-1部分:六價鉻.使用比色法確定金屬無色和有色防腐蝕涂層中是否存在六價鉻 (Cr(VI))(IEC 62321-7-1-2015).德文版本EN 62321-7-1-2015
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); Ger