GB/T 41439-2022 stipulates the determination method of pH of paper, Cardboard and pulp saline water extracts. The standard clarifies the scope and principle of application, explains the equipment, reagent materials, sample preparation, test steps in detail, and standardizes the calculation and representation of the pH value. It provides a unified standard for scientific and accurate determination of the acid alkalinity of saline water extracts of related materials, which helps to evaluate the performance of paper products and control the mass of products.
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 | Y30 | ICS | 85.040;85.060 |
| Release Date | 2022-04-15 00:00:00 | Implementation Date | 2022-11-01 00:00:00 |