Record Display for the EPA National Library Catalog
RECORD NUMBER: 18 OF 26
|OLS Field Name||OLS Field Data|
|Main Title||Method 1664, Revision B: 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.|
|CORP Author||Environmental Protection Agency, Washington, DC. Office of Water.|
|Additional Subjects||Water pollution sampling ; Hexanes ; Extraction ; Gravimetric analysis ; Test methods ; Chemical analysis ; Silica gel ; Quality control ; Pollution regulations ; Oils ; Greases ; Cruce oil ; Petroleum products ; EPA Method 1664 ; HEM(N-Hexane Extractable Material) ; SGT-HEM(Silica Gel Treated N-Hexane Extractable Material)|
This method is for determination of n-hexane extractable material (HEM; oil and grease) and n-hexane extractable material that is not adsorbed by silica gel (SGT-HEM; non-polar material) in surface and saline waters and industrial and domestic aqueous wastes. Extractable materials that may be determined are relatively non-volatile hydrocarbons, vegetable oils, animal fats, waxes, soaps, greases, and related materials. This method is capable of measuring HEM and SGT-HEM in the range of 5 to 1000 mg/L, and may be extended to higher levels by analysis of a smaller sample volume collected separately.