敦煌李广杏干中农药残留、二氧化硫及重金属含量的检测与安全评价

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Abstract： To assess the food safety of Dunhuang Li Guang dried apricots， this study used liquid chromatography-massspectrometry and gas chromatography-mass spectrometry to test for two pesticide residues （imidaclopridandcyhalothrin）in1O samples.Heavy metal arsenic content was determined by atomic absorption spectrometry，and sulfur dioxide residues were detected by acid-base titration. Based on this，a single-factor contamination index method was used for safety evaluation.Theresults showedthatthe detectionrate of imidacloprid in Dunhuang Li Guang dried apricots was 40% ，with an average residue of 0.046mg-1kg-1 ；the detection rate of cyhalothrin was 40% ，with an average residue of 0.067mg.kg-1 ；the detection rate of sulfur dioxide was 80% with an average content of 0.024gkg-1 ; and the detection rate of heavy metal arsenic was 10% ，with a content of 0.043mgkg-1 The safety evaluation showed that allsamples were at a“clean”level，fully meeting national fod safety standards. Dunhuang Li Guang dried apricots are considered safe for consumption.

Keywords： Dunhuang Li Guang dried apricots; pesticide residues; sulfur dioxide; heavy metals; safety evaluation

敦煌李广香干是甘肃省敦煌市特色农产品，具有重要经济价值和出口地位。（剩余5977字）