ASTM-D4085 › Historical Revision Information
Standard Test Method for Metals in Cellulose by Atomic Absorption Spectrophotometry
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Scope
1.1 This test method covers the determination of the iron, copper, manganese, and calcium content of cellulose pulp from wood or cotton.
1.2 This standard does not purport to address all of the safety problems, 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.
Significance and Use
Manganese in pulp acts as a catalyst in oxidizing cellulose.
Iron in pulp can cause yellowness in rayon fibers and influence cellulose acetate plastics color. Iron also causes problems in photographic and blueprint papers.
Copper in pulp can act as a retardant in oxidizing cellulose and can affect viscose ripening. Copper interferes with the dye level of rayon fibers and influences cellulose acetate plastics color.
Calcium in pulps can cause problems in processing into acetate, rayon, cellophane, etc. Calcium can create undesirable deposits in viscose spinning and film casting operation. Calcium can influence viscosity control during cellulose acetate manufacture.
Keywords
analysis; atomic absorption; cellulose; metals; ICS Number Code 85.040 (Pulps)
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Document Number
ASTM-D4085-93(2003)
Revision Level
1993 R03 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
May 1, 2003
Document Type
Test Method
Page Count
3 pages
Committee Number
D01.36