This standard specifies chemical analysis methods for the determination of hexavalent chromium content in chromium-containing refractories by spectrophotometry, applicable to the determination of hexavalent chromium content less than 500 μg/g. The method is based on the solubility of hexavalent chromium in alkali solutions, reacting with diphenylaminourea to produce a purple substance. Absorbance is determined by spectrophotometer at a wavelength of 540-550 nm. This standard provides an accurate analytical means for the detection of hexavalent chromium in refractories, helping to ensure the safety of the material environment.
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 | Q40 | ICS | 81.080 |
| Release Date | 2015-12-10 00:00:00 | Implementation Date | 2017-01-01 00:00:00 |
