GB/T 2390-2013 "Dyes - Determination of pH value"

This standard specifies the method for determining the pH value of dyestuff, which is suitable for the pH value detection of various types of dyestuff. The method requires that dyestuff be dissolved or dispersed in distilled water with a pH value adjusted to 7, and its pH value be determined by acidity meter. This standard emphasizes the use of analytically pure reagents and distillation water in accordance with specifications to ensure the accuracy of the test. The standard details the analytical steps and required instruments, and aims to provide standardized operation guidelines for the pH value determination of dyestuff.

This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.