ASTM-D7967 › Standard Test Method for Analysis of Chrome Content (as Cr2 O3 ) in Wet Blue using Atomic Absorption or ICP
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Scope
1.1 This test method covers the Atomic Absorption procedure, using nitrous oxide-acetylene flame, air-acetylene flame or ICP (Inductively coupled plasma) to analyze the chrome content of Wet Blue (and leather) on a moisture-free basis.
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. Some specific hazards statements are given in Section 9 on Hazards and in 12.5 and 12.20.
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.
Significance and Use
5.1 The procedure described is for chromium in Wet Blue using Atomic Absorption or ICP. This method may be used to determine the chromium content in Wet Blue as an alternate to Test Method D6656.
5.2 The chromium content of Wet Blue is related to the degree of tannage obtained, and hence may be a matter for specification in the purchase of Wet Blue. The procedure described provides adequate accuracy for this purpose.
Keywords
AA; atomic absorption; chrome content; chromic oxide; chromium; ICP; leather; Wet Blue;
To find similar documents by ASTM Volume:
15.04 (Soaps and Other Detergents; Polishes; Leather; Resilient Floor Coverings)
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Document Number
ASTM-D7967-21
Revision Level
2021 EDITION
Status
Current
Modification Type
Revision
Publication Date
Sept. 23, 2021
Document Type
Test Method
Page Count
6 pages
Committee Number
D31.02