1. GBT/16488-1996. Water Quality-Determination of Petroleum oil, Animal and Vegetable oils—Infrared Photometric Method.
2. Method 418.1: Determination of Petroleum Hydrocarbons by Spectrophotometric Infrared;EPA,1978
3. Method D 3921-96: Standard Test Method for Oil and Grease and Petroleum Hydrocarbons in Water;ASTM,2003
4. Method 5520C: Standard Methods for the Examination of Water and Wastewater;APHA,2000
5. Nitration of biodiesel of waste oil: Nitrated biodiesel as a cetane number enhancer