ASTM D3897-91(2006)
Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
- Standard No.
- ASTM D3897-91(2006)
- Release Date
- 1991
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D3897-91(2012)
- Latest
- ASTM D3897-18
- Scope
Basicity is a ratio. In any chromic salt solution, the electrovalence of the chromium (+3) is satisfied by the hydroxyl ions and by acid ions. The extent to which this electravalence is satisfied by the hydroxyl ions, expressed as a percentage, is the basicity. The basicity of a chrome tanning liquid is closely related to the tanning behavior of the solution.
1.1 This practice is intended to show how the results of the chromium analysis (Test Method D 3898) and the acidity determination (Test Method D 3913) can be combined to permit calculation of the basicity of a chrome tanning liquor.
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 D3897-91(2006) Referenced Document
- ASTM D3898 Standard Test Method for Chromic Oxide in Basic Chromium Tanning Liquors*， 2023-12-01 Update
- ASTM D3913 Standard Test Method for Acidity in Basic Chromium Tanning Liquors*， 1993-04-19 Update
ASTM D3897-91(2006) history
- 2018 ASTM D3897-18 Standard Test Method for Calculation of Basicity of Chrome Tanning Liquors
- 2017 ASTM D3897-17 Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
- 1991 ASTM D3897-91(2012) Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
- 1991 ASTM D3897-91(2006) Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
- 1991 ASTM D3897-91(2001) Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
- 1991 ASTM D3897-91(1996) Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
