Chinese Journal of Chromatography ›› 2013, Vol. 31 ›› Issue (11): 1081-1086.DOI: 10.3724/SP.J.1123.2013.05005

• Articles • Previous Articles     Next Articles

Determination of 21 phenolic compounds in soil by ultrasonic extraction-gas chromatography

YANG Lili, WANG Meifei, HU Enyu, LIU Jing, WU Lijuan   

  1. Nanjing Environmental Monitoring Center, Nanjing 210013, China
  • Received:2013-05-02 Revised:2013-07-20 Online:2013-11-28 Published:2013-12-05

Abstract:

An effective method was developed to determine phenolic compounds in soil by ultrasonic extraction-gas chromatography (GC). The soil sample was extracted with methylene dichloride-hexane (2:1, v/v) for 3 min with the extraction temperature lower than 50 ℃ for 3 times. The extract was purified by alkaline aqueous solution (pH >12), and the phenolic compounds were dissolved in aqueous solution. After the organic solution was discarded, the aqueous solution was adjusted to pH<3 and subsequently extracted with methylene dichloride-ethyl acetate (4:1, v/v) twice. The analytes were determined by GC-FID and quantified by external standard method. The limits of quantification for all tested phenolic compounds were 0.01-0.06 mg/kg in about 10 g soil samples. The recoveries were between 62.9% and 111.4% with the relative standard deviations (RSDs) in the range of 4.3%-24.0% (n=6). The results showed that this method is sensitive, accurate, and suitable for the determination of the 21 phenolic compounds in soil.

Key words: gas chromatography (GC), phenolic compounds, soil, ultrasonic extraction

CLC Number: