GB/T 39560.702-2021电子电气产品中某些物质的测定 第7-2部分：六价铬 比色法测定聚合物和电子件中的六价铬[Cr（VI）]Determination of certain substances in electrical and electronic products. Part 7-2:Hexavalent chrome. Determination of hexavalent chrome[Cr(VI)]in polymers and electronics by the color

GB/T 39560.702-2021电子电气产品中某些物质的测定 第7-2部分：六价铬 比色法测定聚合物和电子件中的六价铬[Cr（VI）]Determination of certain substances in electrical and electronic products. Part 7-2:Hexavalent chrome. Determination of hexavalent chrome[Cr(VI)]in polymers and electronics by the colormetric method