Rapid Detection of Pesticide Residues in Illicium verum Based on Portable Mass Spectrometry
The article investigated a semi quantitative method for detecting pesticide residues in spices based on portable mass spectrometry technology,using Illicium verum as the experimental material to explore the sensitivity and accuracy of the detection method.The results showed that compared to the QuEChERS(Quick,Easy,Cheap,Effective,Rugged,Safe)method,using the improved QuEChERS parent to treat samples can better extract pesticides from the matrix of Illicium verum.Portable mass spectrometry detection has a strong matrix effect(ME),and there is a significant difference in the ME between the mother ion and daughter ion detection modes,which varies depending on the type of pesticides.The ME of three pesticides,namely cyromazine,buprofezin and prochloraz,ranges from-99.59 to-79.65.Under the improved QuEChERS method,there was a good linear relationship between cyromazine and buprofezin in the range of 0-20 mg/L(R2≥0.9995),while prochloraz showed a good linear relationship in the range of 0-10 mg/L(R2≥0.9989).The detection limits for cyromazine,buprofezin and prochloraz are 5 mg/kg,500 μg/kg and 1 mg/kg,respectively,,with a sensitivity of up to 100％,a false positive rate.of 0,a false negative rate of 0,and a relative accuracy of over 98.6％.In addition,the relative accuracy of pesticides detection in the daughter ion detection mode reaches 100％,which can meet the semi quantitative detection requirements of three pesticides,namely cyromazine,buprofezin and prochloraz in spices.
portable mass spectrometerIllicium verumpesticide residuerapid detection
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