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ASTM D3897-91(2006)
Standard Practice for Calculation of Basicity of Chrome Tanning Liquors
Automaticky preložený názov:
Štandardná prax pre výpočet zásaditosti chromočinění Liquors
NORMA vydaná dňa 1.10.2006
Informácie o norme:
Označenie normy: ASTM D3897-91(2006)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.10.2006
Kód tovaru: NS-25272
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM D3897-91(2006) :
Keywords:
basicity, chrome tanning liquor, Schorlemmer, ICS Number Code 59.140.10 (Processes and auxiliary materials)
Doplňujúce informácie
| Significance and Use | ||||
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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. |
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| 1. Scope | ||||
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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. |
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| 2. Referenced Documents | ||||
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