首页> 美国政府科技报告 >Method 1664, Revision A: n-Hexane Extractable Material (HEM; Oil and Grease) and211 Silica Gel Treated n-Hexane Extractable Material (SGT-HEM; Non-Polar Material) by 211 Extraction and Gravimetry
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Method 1664, Revision A: n-Hexane Extractable Material (HEM; Oil and Grease) and211 Silica Gel Treated n-Hexane Extractable Material (SGT-HEM; Non-Polar Material) by 211 Extraction and Gravimetry

机译:方法1664,修订版a:正己烷可提取物质(HEm;油和油脂)和211硅胶处理的正己烷可提取物质(sGT-HEm;非极性物质)通过211萃取和重量分析

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摘要

This method is for determination of n-hexane extractable material (HEM; oil and211u001egrease) and n-hexane extractable material that is not adsorbed by silica gel (SGT-211u001eHEM; non-polar material) in surface and saline waters and industrial and domestic 211u001eaqueous wastes. Extractable materials that may be determined are relatively non-211u001evolatile hydrocarbons, vegetable oils, animal fats, waxes, soaps, greases, and 211u001erelated materials. This method is capable of measuring HEM and SGT-HEM in the 211u001erange of 5 to 1000 mg/L, and may be extended to higher levels by analysis of a 211u001esmaller sample volume collected separately.

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