1. Chinese Standard. 1989. GB 11914–1989. Water quality determination of the chemical oxygen demand dichromate method.
2. Chinese Standard. 1996. GB 8978–1996. The national integrated wastewater discharge standard.
3. Chinese Standard. 1997. GB 260–1997. Petroleum products determination of water.
4. Chinese Standard. 1996. GB/T16488-1996. Water quality-Determination of petroleum oil, animal and vegetable oils-Infrared photometric method.