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Citation: DU Bing, LIU Aimin, HUANG Yeru. Uncertainty evaluation of the determination of toxic equivalent quantity of polychlorinated dibenzo-p-dioxins and dibenzofurans in soil by isotope dilution high resolution gas chromatography and high resolution mass spectrometry[J]. Chinese Journal of Chromatography, ;2014, 32(9): 967-970. doi: 10.3724/SP.J.1123.2014.05022 shu

Uncertainty evaluation of the determination of toxic equivalent quantity of polychlorinated dibenzo-p-dioxins and dibenzofurans in soil by isotope dilution high resolution gas chromatography and high resolution mass spectrometry

1.
Key Laboratory of Dioxins Pollution Control for State Environmental Protection, National Research Center for Environmental Analysis and Measurements, Beijing 100029, China

Corresponding author: DU Bing,
Received Date: 22 May 2014
Available Online: 8 July 2014
Fund Project: 国家重大科学仪器设备开发专项(2011YQ060084) (2011YQ060084)环保公益性重大项目(201309001). (201309001)

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in soil samples were analyzed by isotope dilution method with high resolution gas chromatography and high resolution mass spectrometry (ID-HRGC/HRMS), and the toxic equivalent quantity (TEQ) were calculated. The impacts of major source of measurement uncertainty are discussed, and the combined relative standard uncertainties were calculated for each 2,3,7,8 substituted congener. Furthermore, the concentration, combined uncertainty and expanded uncertainty for TEQ of PCDD/Fs in a soil sample in I-TEF, WHO-1998-TEF and WHO-2005-TEF schemes are provided as an example. I-TEF, WHO-1998-TEF and WHO-2005-TEF are the evaluation schemes of toxic equivalent factor (TEF), and are all currently used to describe 2,3,7,8 substituted relative potencies.
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