Abstract:Objective To establish a method for the determination of 14 pesticide residues in fruits using gas chromatography-mass spectrometry. Methods The samples were purified by solid-phase extraction, separated by TG-1701MS quartz capillary column in temperature-programmed mode, and quantified by mass spectrometry in selected ion mode. Results The detection limit was 0.002-0.01 mg/kg, the linear correlation coefficient r reached 0.995, the relative standard deviation (RSD) was 1.4%-5.5%, and the recovery rate was 71.6%-115.1%. 80 fruit samples were detected, and methamidophos was detected twice at 0.04 and 0.05 mg/kg, respectively. Isocarbophos was detected once at 0.02 mg/kg, and triazophos was detected twice, both at 0.22 mg/kg. Conclusion A method for simultaneous determination of 14 pesticides is established, and it has certain practical value for the determination of pesticide residues in actual samples.
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