ASTM D6401-99 - 10.5.1999
 
1. Scope

1.1 This test method is intended for use in determining the quantity of soluble non-tannins and tannin in solutions of tannin extracts, water extracts of vegetable tanning materials, or tanning liquors. The method is applicable to the analysis of liquid, solid, pasty, and powdered extracts and to extracts of raw or spent materials.

1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.

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.

 
2. Referenced Documents

D4903-99(2026)

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

D4905-99(2026)

Standard Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts

D6405-99(2020)

Standard Practice for Extraction of Tannins from Raw and Spent Materials

D6402-99(2020)

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

D3790-24

Standard Test Method for Volatile Matter (Moisture) of Leather by Oven Drying

D4902-99(2026)

Standard Test Method for Evaporation and Drying of Analytical Solutions

Non-Tannins and Tannin Official Methods of the American Leather Chemists Association. Available from the American Leather Chemists Association, University of Cincinnati, P.O. Box 210014, Cincinnati, OH 45221-0014.

D2617-24

Standard Test Method for Total Ash in Leather

D4901-99(2026)

Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts