EPA Method 1664, Revision A, n-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel-Treated n-Hexane Extractable Material (SGTHEM; Non-polar Material) by Extraction and Gravimetry. Dionex ...
The use of solid phase extraction (SPE) has been developed and improved over the years since its introduction into organic extraction and has been included in US EPA Method 1664 since its start in the ...
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