In order to improve the sensitivity and accuracy of detecting persistent organic pollutants in food samples,this study used gas chromatography-mass spectrometry technology and improved the detection method by optimizing sample pretreatment and chromatographic and mass spectrometry conditions.The results showed that the optimized method can simultaneously analyze 11 POPs within 22 minutes,with a 2～3 fold increase in detection sensitivity and a minimum detection limit of 0.01 ng·g-1;in the concentration range of 0.1 ng·mL-1 to 100.0 ng mL-1,the linear relationship was good and the correlation coefficient was greater than 0.999;the methodological validation results indicate that the optimized GC-MS/MS method has good linear relationship,low detection limit and quantification limit,as well as high precision and accuracy,and is suitable for trace detection of persistent organic pollutants in food;200 different types of food samples were tested,and the POPs content in all samples did not exceed the standard,verifying the reliability and practical value of the method.
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