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Standard Test Method for Acidity in Basic Chromium Tanning Liquors (Includes all amendments and changes 4/17/2020).
Přeložit název
NORMA vydána dne 1.4.2020
Označení normy: ASTM D3913-03(2020)e1
Datum vydání normy: 1.4.2020
Kód zboží: NS-991722
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
acidity, basic chromium tanning liquor, basicity ,, ICS Number Code 59.140.10 (Processes and auxiliary materials)
Significance and Use | ||
4.1 The acidity of a chrome tanning liquor, as determined by this test method, is rarely employed as such. This result is normally combined with the results of a chromium analysis (see Test Method D3898) to determine a property of the liquor called basicity. This property, equal to the percentage by which anions in a normal chromic salt have been replaced by hydroxyl in the solution being analyzed, is closely related to the tanning behavior of the solution. |
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1. Scope | ||
1.1 This test method covers the determination of the titratable acidity of chromium tanning liquors. By 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. |
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2. Referenced Documents | ||
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