1. Standard Methods for the Examination of Water and Waste Water 21st editions 2005
2. Method 1664, Revision A. n-hexane extractable material (HEM; oil and grease) and silica gel treated n-hexane extractable material by extraction and gravimetry;US Environmental Protection Agency;Federal Register,1998
3. Extraction of dispersed oils from water for quantitative analysis by infrared spectrophotometry;Gruenfeld;Environ. Sci. Technol.,1973
4. ISO93772/2000 “Water Quality- Determination of Hydrocarbon Oil Index,” 2000
5. ASTM D3921-03 “Standard Test Method for Oil and Grease and Petroleum.”