GB/T 9338-2008 "Fluorescent Whitening Agents—Determination of Relative Whiteness—Instrumental Method" specifies the instrumental method for determining the relative whiteness of fluorescent whitening agents, applicable to various types of fluorescent whitening agent products. Using a specialized whiteness measuring instrument, the reflectance of the sample is measured under specific lighting and observation conditions to calculate the relative whiteness value. The detection requires instruments such as a fluorescent whiteness meter, standard whiteboard, and sample preparation device, providing a unified basis for the quality control of the whitening effect of fluorescent whitening agents.
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 | 2008-09-18 00:00:00 | Implementation Date | 2009-05-01 00:00:00 |
