GB/T 7978-2005 "Pulp—Determination of acid-insoluble ash" specifies the method for determining the acid-insoluble ash content in pulp, applicable to various types of pulp. After ashing the pulp sample, hydrochloric acid is used to dissolve the soluble components in the ash. The acid-insoluble residue is separated by filtration, washed, dried, and weighed to calculate the acid-insoluble ash content. The standard clarifies requirements for ashing temperature, acid treatment conditions, and weighing precision, providing a basis for assessing the content of inorganic impurities in pulp.
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 |
| Release Date | 2005-09-26 00:00:00 | Implementation Date | 2006-04-01 00:00:00 |
