A method was established for the simultaneous determination of nine strobilurin fungicides in tomatoes by GC-MS/MS. The samples were extracted by acetonitrile and purified by anhydrous magnesium sulfate, n-propyl ethylenediamine (PSA), C18 and GCB and optimization by orthogonal test. Rtx-5 chromatographic column was used for temperature programmed separation, EI ionization source was used for qualitative analysis in MRM monitoring mode. And matrix calibration curve external standard method was used for quantitative analysis. The results showed that a good linear relationships for all kinds of strobilurin fungicides were good in the range of 5-800 ng/mL with the correlation coefficient of 0.993 9-0.999 5. The detection limit was from 0.5 μg/kg to 2.5 μg/kg, while the quantification limit was from 2-8 μg/kg. The recovery rate in samples were 73.24%-91.38%, and the relative standard deviations were 2.51%-10.18%. The method is accurate, precise, simple and economic. It suits the requirements of trace detection of nine strobilurin fungicides in tomatoes.
XU Peng
,
ZHAO Jianzhen
,
YAN Weiwei
,
LUO Huiyu
,
CHEN Jiachen
,
LIU Hui
. Determination of nine strobilurin fungicides in tomatoes by QuEChERS-gas chroatography-tandem mass spectrometry[J]. Food and Fermentation Industries, 2020
, 46(21)
: 242
-246
.
DOI: 10.13995/j.cnki.11-1802/ts.024392
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