A method was evaluated for the determination of seventeen kinds of 2,3,7,8-substitituted polychlorinated dibenzo-p-dioxins and dibenzofurans (FQDD/Fs ) in vegetable oil sample by isotope dilution high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS). Sample was cleaned up successively with sulfonation reaction, multi-layer silica gel column and alumina gel column. The results showed that the recoveries were in the range of 60%~109M>,RSD<8.10%, average recoveries (n=4) of vegetable oil were 78.5%~100. 3%,RSD was 2.2%~8.4%,the results conformed to EPA1613.It is proved that the experimental method for the analysis of FGDD/Fs in vegetable oil is reliable.%植物油加标后依次经过浓硫酸磺化、多段混合硅胶柱和氧化铝柱净化,采用高分辨气相色谱/高分辨质谱同位素稀释法对其中的17种2,3,7,8-氯取代二噁英类化合物进行测定.实验结果表明,用该法分析植物油样品,PCDD/Fs提取内标的平均回收率为60％～109％,RSD＜8.10％,植物油样品平行四次的平均回收率为78.5％～100.3％,RSD为2.2％～8.4％,结果符合EPA1613的要求,证明应用该实验方法分析植物油中二噁美类化合物是准确可靠的.
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