1. GB/T 13223-2003. Emission standard of air pollutants for thermal power plants.
2. GB/T 4915-2004. Emission standard of air pollutants for cement industry.
3. Z. B. Shi: Coal Technology. Vol. 25 (2006), 123.
4. JY-T 015-1996. General rules for inductivety coupled plasma-atomic emission spectrometry.
5. GB/T 6904-2008. Water used in industrial circulating cooling system and boiler - Determination of pH.