ASTM D3897-1991(2012)
铬鞣液碱性值计算的标准实施规程

Standard Practice for Calculation of Basicity of Chrome Tanning Liquors


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ASTM D3897-1991(2012)



标准号
ASTM D3897-1991(2012)
发布日期
1991
实施日期
废止日期
中国标准分类号
Y45
国际标准分类号
59.140.10 (Processes and auxiliary materials)
发布单位
US-ASTM
适用范围

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 D3898) and the acidity determination (Test Method D3913) can be combined to permit calculation of the basicity of a chrome tanning liquor.

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 and health practices and determine the applicability of regulatory limitations prior to use.





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