ASTM D3913-03(2020)e1 PDF

Scope: 1.1 This test method covers the determination of the titratable acidity of chromium tanning liquors. By titratable acidity is meant not only free acidity, which is rarely present, but also anions combined with weakly basic cations such as Chromium (III), which can be titrated with base at the phenolphthalein end point. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D3913-03(2020)e1 Referenced Document

ASTM D3898 Standard Test Method for Chromic Oxide in Basic Chromium Tanning Liquors*， 2023-12-01 Update

2020 ASTM D3913-03(2020)e1 Standard Test Method for Acidity in Basic Chromium Tanning Liquors
2003 ASTM D3913-03(2015) Standard Test Method for Acidity in Basic Chromium Tanning Liquors
2003 ASTM D3913-03(2009) Standard Test Method for Acidity in Basic Chromium Tanning Liquors
2003 ASTM D3913-03 Standard Test Method for Acidity in Basic Chromium Tanning Liquors
1993 ASTM D3913-93(1998) Standard Test Method for Acidity in Basic Chromium Tanning Liquors