GB/T 21879-2015 "Water-soluble dyes—Determination of solubility—Spot filtration paper method" is applicable to the qualitative and semi-quantitative determination of the solubility of water-soluble dyes. Dye samples and standard concentration dyes are spotted on filter paper separately, and the dissolution, diffusion, and halo characteristics of the dyes at the spotting locations are observed. By comparing with standard samples, the solubility range is determined. No complex instruments are required, and observation is assisted by a magnifying glass. The method is simple, fast, and provides basic data for dye applications.
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 | G55 | ICS | 87.060.10;71.100.01 |
| Release Date | 2015-05-15 00:00:00 | Implementation Date | 2015-12-01 00:00:00 |