Oil and Grease
Method 1664, Revision A: N-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated N-Hexane Extractable Material (SGT-HEM; Non-polar Material) By Extraction and Gravimetry
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- Fact sheet (February 1999) about the test method.
- Test method published in the Federal Register (May 14, 1999)
- Method 1664, Revision A | Print Version (PDF) (28 pp, 213K)
- Guidance on implementation and use (PDF) (44 pp, 238K)
- Questions and Answers
- Modifications to Method 1664A
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