Determination of BTEXs with Static Headspace-Gas Chromatography/Mass Spectrometer by Direct Heating Soil Samples
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Supported by the foundation of Institute of Soil Science, Chines Academy of Sciences (No.20752010028)

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    Abstract:

    BTEXs (Benzene, Toluene, Ethylbenzene & Xylene) as a kind of pollutants in the hunman living environment, like soil, could cause serious harm to human health. In this study an analytical method of BTEXs in soil samples was developed to determine these pollutants in the soil in a simple, convenient and environment friendly way. Soil samples contaminated with BTEXs were determined with CP-8 ms capillary column by Static Headspace-Gas Chromatography/Mass spectrometer (HS-GC/MS) under modified conditions. The optimal procedure goes: put fresh soil samples in 20 ml flasks, 10 g each, and have them heated at 95 ℃ in the hot shakable incubator, agitated at rate of 500 r min-1 for 20 s, kept still for 90 s subsequently, and after 15 mins incubation the whole system reaches equilibrium. The BTEXs detection limit of the method varied in the range of 0.23~1.35 μg kg-1; and the standard curve correlation coefficient (r) of each BTEXs target ranged at 0.993 3~0.998 0. The sample recovery rate lingered in the scope of 74.2%~123% with the method precision varying in the range of 2.35%~7.27% (n=7). All demonstrate that the method meets the requirements of organic analysis.

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CHEN Hong, ZHONG Ming, TANG Haoye, HAN Yong, JIN Wei. Determination of BTEXs with Static Headspace-Gas Chromatography/Mass Spectrometer by Direct Heating Soil Samples[J]. Acta Pedologica Sinica,2016,53(4):1074-1083.

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History
  • Received:January 05,2016
  • Revised:April 12,2016
  • Adopted:April 20,2016
  • Online: May 03,2016
  • Published: