GB/T 745-2003 "Pulps—Determination of Pentosans" specifies the method for determining pentosans in pulp, applicable to various types of pulp. The method involves hydrolyzing pentosans in pulp into furfural using hydrochloric acid hydrolysis. After separating furfural through distillation, its absorbance is measured using a spectrophotometer, and the pentosan content is calculated based on a standard curve. The standard defines hydrolysis conditions, distillation parameters, and color reaction requirements, providing data support for evaluating pulp raw material composition and the effectiveness of pulping processes.
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 | Y31 | ICS | 85.040 |
| Release Date | 2003-08-25 00:00:00 | Implementation Date | 2003-12-01 00:00:00 |
