Objective:To establish a quantitative screening method for 60 pesticide residues in Siraitia grosvenoriis.Methods:The samples were extracted with acetonitrile by high-speed homogenizer and purified by multi-walled carbon nanotube solid-phase extraction.The data were collected by ultra-high performance liquid chromatography-mass spectrometry in a dynamic multi-reaction monitoring mode with simultaneous scanning of positive and negative ions.The blank matrix matching method was used for quantitative calculation.Results:The 60 pesticide residues show good linearity,with correlation coefficients r of above 0.996.The average recoveries of 59 pesticide residues range from 63.9%to 108.3%,with RSDs of less than 15%.Two forbidden pesticides and 12 common pesticides are found in 55 batches of samples.Conclusion:The method has good sensitivity and accuracy,suitable for the determination of multiple pesticide residues in Siraitia grosvenoriis.
关键词
罗汉果/多壁碳纳米管/农药残留/超高效液相色谱-质谱法
Key words
Siraitia grosvenorii(Swingle)C.Jeffrey ex A.M.Lu et Z.Y.Zhang/multi-walled carbon nanotube/pesticide residues/ultra-high performance liquid chromatography-mass spectrometry
维普
万方数据