ASTM D4900-99(2016) PDF

Scope: 4.1 This test method is useful to detect possible adulteration of tanning material extract with cheap and inferior lignosulfonates.

1.1 This test method is intended for use in detecting the presence of lignosulfonates (sulfite cellulose) in extracts of tanning materials.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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.

ASTM D4900-99(2016) Referenced Document

ASTM A50 Specification for Quenched Carbon-Steel Track Bolts
ASTM D4901 Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts*， 2020-12-01 Update
ASTM D4905 Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts*， 2020-12-01 Update
ASTM D6404 Standard Practice for Sampling Vegetable Materials Containing Tannin*， 2020-12-01 Update
ASTM D6405 Standard Practice for Extraction of Tannins from Raw and Spent Materials*， 2020-12-01 Update

2020 ASTM D4900-99(2020) Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
1999 ASTM D4900-99(2016) Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
1999 ASTM D4900-99(2009) Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
1999 ASTM D4900-99(2004) Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
1999 ASTM D4900-99 Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts