1.1 This test method covers the determination of the organically combined sulfuric anhydride existing in a sample of sulfonated or sulfated oil, or both, by extracting the undecomposed sulfonated or sulfated fat and other fatty matter over
ASTM
Standard Test Method for Determination of Organically Combined Sulfuric Anhydride Ash-Gravimetric, Test Method C
STD-59573
1995
2012-04-01
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