ASTM D4902-99 - 10.5.1999
 
1. Scope

1.1 This practice is intended for use in evaporating and drying the 100 mL portions of analytical solution, obtained in Methods D4903 and ALCA A21 and A22 so that consistent results may be obtained for the determination of total solids, soluble solids, and non-tannins in the sample. It is also intended for use in determining the moisture in the air-dry and prepared, wet, hide powders used in ALCA Method A22, and the moisture in raw and spent materials (ALCA Method A6).

 
2. Referenced Documents

D6401-99(2020)

Standard Test Method for Determining Non-Tannins and Tannin in Extracts of Vegetable Tanning Materials

D6402-99(2020)

Standard Test Method for Determining Soluble Solids and Insolubles in Extracts of Vegetable Tanning Materials

D6403-99(2020)

Standard Test Method for Determining Moisture in Raw and Spent Materials

Evaporation and Drying of Analytical Solutions Official Methods of the American Leather Chemists Association. Available from the American Leather Chemists Association, University of Cincinnati, P.O. Box 210014, Cincinnati, OH 452210014.

D4903-99(2026)

Standard Test Method for Total Solids and Water in Vegetable Tanning Material Extracts