ALKALI SOLUBILITY OF PULP AT 25 DEGREE C

• Determination of alkali solubility can be applied to bleached and delignified pulps only.
• Lignin interferes with the extraction and determination of carbohydrates.
• Method cannot be applied to unbleached pulps.
• Pulp is extracted with a sodium hydroxide solution of 10%, 18%, or 21.5% at 25 ° C for 1h.
• Dissolved carbohydrates are determined by oxidation with potassium dichromate .
• Provides information on the degradation of cellulose and on a loss or retention of hemicelluloses during pulping and bleaching processes.
• 10% sodium hydroxide solution possesses maximum dissolving power and dissolves both Degraded cellulose and hemicelluloses.
• Resistance of pulps to 21.5% sodium hydroxide solution has been related to the rayon yield of dissolving pulps.

It Provides information on:

• Scope.
• Content.
• Keywords.
• Sampling.
• Procedure.
• Test specimens.
• Apparatus.
• Reagents.

It Benefits:

• Production Manager.
• Technical Manager.
• Researchers.
• Laboratory Personal.