The content of residual bleaching agent after pulp bleaching can be determined by the following methods:
Determining the measurement sample: Before the determination of the residual bleaching agent content after pulp bleaching, it is necessary to determine the sample to be measured.
Sample treatment: put the sample in an appropriate container, add an appropriate amount of deionized water, and stir the sample evenly.
Adding reagents: Add a certain amount of potassium iodide reagent and potassium acetate reagent into the sample, and stir evenly.
Titration: Titrate the sample with sodium sulfite solution until the solution turns from dark blue to pale yellow.
Calculation of content: Calculate the content of residual bleach in the sample according to the volume of sodium sulfite solution used for titration.
NBCHAO reminds you: before carrying out the determination of the residual bleaching agent content after pulp bleaching, it is necessary to prepare the necessary equipment and reagents, and follow the laboratory operating specifications to ensure the safety and reliability of the experiment. At the same time, attention should also be paid to the handling of samples and the accuracy of titration operations to obtain reliable measurement results.
