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Standard Test Method for Total Ash in Wet Blue or Wet White
Automatische name übersetzung:
Standard Test Method for Gesamt Ash in wirt blau oder weiblich weiß
NORM herausgegeben am 1.5.2013
Bezeichnung normen: ASTM D6716-08(2013)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.5.2013
SKU: NS-36257
Zahl der Seiten: 2
Gewicht ca.: 6 g (0.01 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
aluminum oxide, ash, blue stock, chrome content, chromic oxide, total ash, wet blue, wet white, ICS Number Code 59.140.30 (Leather and furs)
Significance and Use | ||||||||
5.1 This test method is useful in determining the approximate amount of nonvolatile inorganic material in wet blue. This may be in the form of salts or oxides of the elements. In a mixed-chrome tannage, the approximate percentage of other elements in the wet blue may be determined by subtracting the chromic oxide that may be conveniently determined on the ash. (See Test Method D6714.) 5.2 The specified temperature of 600°C is high enough to produce a reproducible result but it does not completely dehydrate such oxides as aluminum oxide (Al2O3) and chromic oxide (Cr2O3). Likewise, such salts as sulfates and phosphates may be incompletely dehydrated, and if alkalis and chromium are present simultaneously, oxidation to chromate may occur. Therefore, caution is advised in drawing conclusions based on quantitative relations of the elements. |
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1. Scope | ||||||||
1.1 This test method covers the determination of total ash in wet blue and wet white. 1.2 For total ash in wet white, the procedure is identical; substitute wet white for wet blue in the standard. 1.3 Total ash in wet blue may be reported upon a number of different bases (for example, fat-free, moisture-free, as received, excluding chromium, and so forth). Before proceeding with any tests, it is very important to determine upon which basis that the total ash is to be reported and to identify all other test methods that will be required to be executed in order to achieve the determined reporting method. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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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Historisch
1.12.2010
Historisch
1.11.2012
Historisch
1.11.2012
Historisch
1.11.2012
Historisch
1.2.2013
Historisch
1.10.2010
Letzte Aktualisierung: 2024-11-04 (Zahl der Positionen: 2 209 323)
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