ASTM D3913-93(1998)
Historical Standard: ASTM D3913-93(1998) Standard Test Method for Acidity in Basic Chromium Tanning Liquors
SUPERSEDED (see Active link, below)
ASTM D3913
1. 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 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D3898 Test Method for Chromic Oxide in Basic Chromium Tanning Liquors
Keywords
acidity; basic chromium tanning liquor; basicity; Acidity, alkalinity, pH--leather; Chrome-tanning materials; Tanning liquors; Titratable acidity;
ICS Code
ICS Number Code 59.140.10 (Processes and auxiliary materials)
DOI: 10.1520/D3913-93R98
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