Chinese Journal of Chromatography ›› 2020, Vol. 38 ›› Issue (8): 945-952.DOI: 10.3724/SP.J.1123.2019.12028

Previous Articles     Next Articles

Determination of 16 polycyclic aromatic hydrocarbon and 23 organochlorine residues in soil by accelerated solvent extraction and magnetic solid phase purification- gas chromatography-tandem mass spectrometry

WEI Dan1,*(), GUO Ming2, WU Huizhen3, ZHANG Ju1   

  1. 1 College of Bioscience and Engineering, Hebei University of Economics and Business; Shijiazhuang 050061, China
    2 Center of Analysis and Testing, Zhejiang Research Institute of Chemical Industry Co., Ltd., Hangzhou 310023, China
    3 College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
  • Received:2019-12-20 Online:2020-08-08 Published:2020-12-11
  • Contact: WEI Dan
  • Supported by:
    the Scientific Research Project of the Zhejiang Provincial Education Department(Y201840776);the Analysis Test Project of Zhejiang Province(2018C37047);the Project of Scientific Research Foundation of Hebei University of Economics and Business(2017KYZ05)

Abstract:

A method combining accelerated solvent extraction (ASE) with magnetic solid-phase extraction (MSPE) and gas chromatography-mass spectrometry (GC-MS) was developed for the simultaneous detection of polycyclic aromatic hydrocarbon (PAH) and organochlorinepesticide (OCP) residues in soil samples. The analytes in the soil samples were extracted using an acetone/n-hexane (1:1, v/v) mixture for 5 min at 100℃. Then, the extraction pool was heated for 5 min under an extractive pressure of 11.032 MPa for three cycles. The extraction pool was washed with an acetone/n-hexane (1:1, v/v) mixture accounting for 60% of the pool volume, followed by nitrogen purging for 100 s. The extract was purified by MSPE using self-made magnetic ZIF-8/nZVI materials at room temperature. The analytes were detected by GC-MS/MS. Under the optimized conditions, good linearities were obtained for the 16 PAHs and the 23 OCPs in the range of 5-200 μg/kg, with correlation coefficients (r2) above 0.99. The limits of detection (LODs) were 0.04-1.21 μg/kg. At three spiked levels in the soil samples, the recoveries of the 39 analytes were between 63.9% and 112.1%, with relative standard deviations (RSDs) between 0.4% and 26.2%. The method was demonstrated to be successful for the determination of 16 PAH and 23 OCP residues in soil samples, with good recoveries.

Key words: gas chromatography-mass spectrometry (GC-MS), accelerated solvent extraction (ASE), magnetic solid-phase extraction (MSPE), polycyclic aromatic hydrocarbon (PAH), organochlorine pesticide (OCP), soil samples