Detection of Sodium Acetate Carbon Source Content by Headspace Gas Chromatography
Nitrate nitrogen(NO3-)as one of the most common water pollutants,has caused serious water pollution problems in many parts of the world.The presence of organic carbon sources is a necessary condition for anaerobic denitrification.Sodium acetate as a carbon source is widely used in wastewater treatment.Currently,the detection methods for the content of sodium acetate carbon source only include chemical titration,spectrophotometry,and CODCr method,which are cumbersome to operate and have many interfering factors.This study developed a detection method based on headspace gas chromatography,in which the sample is acidified with phosphoric acid to generate acetic acid for headspace measurement.The results showed that the linear relationship of sodium acetate in the concentration range of 10～250 mg/L was excellent,with a correlation coefficient of 0.999 91.The spiked recovery of the samples was between 91.8％and 102.3％,and the relative standard deviation was less than 5％.This method is accurate,simple,and fast,greatly improving work efficiency,and is suitable for promotion in environmental laboratories at all levels.
sodium acetate carbon sourceheadspace gas chromatographyacetic acid
万方数据
维普
