TAPPI T 222 : 2002(R2015)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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ACID-INSOLUBLE LIGNIN IN WOOD AND PULP
24-11-2021
01-01-2015
The carbohydrates in wood and pulp are hydrolyzed and solubilized by sulfuric acid; the acid-insoluble lignin is filtered off, dried, and weighed Specifies a procedure which can be applied to the determination of acid-insoluble lignin in wood and in all grades of unbleached pulps.
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