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Normas ASTM – AENOR
ASTM D3971-89(2004)

ASTM D3971-89(2004)

Standard Test Method for Dichloromethane-Soluble Matter in Cellulose

Fecha:
2010-12-31 /Historical
Superseeded by:
Significance and Use:

Dichloromethane-soluble materials are typically referred to as extractives. These extractives are comprised of organic materials that originated in the wood or cotton. The measure is an indication of the efficiency of removal of these substances during pulping and bleaching. The extractive level is of concern to dissolving pulp users since the presence of large amounts of extractives could inhibit the processing of cellulose into the desired derivative.

Scope:

1.1 This test method covers the determination of dichloromethane-soluble matter in cellulose and is applicable to dissolving-type cellulose pulps prepared from cotton or wood.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords:
dissolving types of cellulose pulps; extractives; fat; removal efficiency of bleaching and pulping; resin; soxhlet; wax
44,54
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