GB/T 5211.6-2020 "General methods of test for pigments and extenders - Part 6: Determination of pH value of an aqueous suspension" applies to the determination of pH value of aqueous suspensions of pigments and extenders. It utilizes a pH meter (accuracy ±0.02) equipped with a glass electrode and a reference electrode. The sample is weighed and mixed with deionized water, stirred with a magnetic stirrer for 1 minute, and then allowed to stand. The pH value of the suspension is measured at 23±2°C. The difference between parallel determination results should be ≤0.2. The standard specifies requirements for electrode calibration, sample preparation, and stirring time to ensure accurate pH value determination.
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 | G53 | ICS | 87.060.10 |
| Release Date | 2020-11-19 00:00:00 | Implementation Date | 2021-10-01 00:00:00 |
