Home / Standards / GB/T 40231-2021 GB/T 40231-2021 Active Restricted substance in electrical and electronic products—Determination of hexavalent chromium—Ion chromatography method 电子电气产品中的限用物质 六价铬的测定方法 离子色谱法 Standard Type GBT ICS 31.020 CCS L10 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 国家标准委 Drafting Unit N/A