GB/T 39560.702-2021 "Determination of certain substances in electrical and electronic products - Part 7-2: Chromium (VI) - Colorimetric method for the determination of chromium (VI) in polymers and electronics" specifies a colorimetric method for the qualitative screening and quantitative determination of hexavalent chromium in polymer materials and electronic components. The principle typically involves the reaction of hexavalent chromium with diphenylcarbazide under acidic conditions to form a purple-red complex, whose absorbance is measured at a specific wavelength using a spectrophotometer.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | L10 | ICS | 31.020;71.040.50 |
| Release Date | 2021-10-11 00:00:00 | Implementation Date | 2022-05-01 00:00:00 |
