Objective To establish a method for the simultaneous determination of five kinds of fungicides (quintozene, chlorothalonil, fluopyram, trifloxystrobin and prochloraz) in strawberry and soil by dispersive solid phase extraction-gas chromatography-tandem mass spectrometry. Methods The samples were extracted with 10 mL ethyl acetate, and N-propyl ethylenediamine was mixed with C18 (50 mg: 50 mg) for solid phase extraction and purification. The multi-reaction monitoring model was used for qualitative analysis and the external standard method was used for quantitative analysis. Results The five fungicides were linear in the concentration range of 1- 1000 g/L, and the correlation coefficients were 0.9802-0.9996. The recoveries of blank samples at 10, 100 and 200 g/kg concentrations were 84%-119% and the relative standard deviations were 1%-17% (n=3). The quantitative limit of this method was 10 g/kg. Conclusion The method can meet the requirement of trace fungicides detection in soil and strawberry samples.
标题：分散固相萃取-气相色谱-串联质谱法同时测定草莓及土壤中5种杀菌剂
英文标题：Simultaneous determination of five fungicides in strawberry and soil by dispersive solid phase extraction-gas chromatography-tandem mass spectrometry
