Simultaneous determination of 11 strobilurin fungicides in different vegetation types of soil by QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry

doi:10.3724/SP.J.1123.2018.02020

Abstract

Abstract:

A method for the simultaneous determination of the 11 strobilurin fungicides (coumoxystrobin, tricyclopyricarb, picoxystrobin, fluoxastrobin, trifloxystrobin, E-metominostrobin, kresoxim-methyl, dimoxystrobin, orysastrobin, pyraoxystrobin and fenaminstrobin) in different vegetation types of soil by QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry was developed. The strobilurin fungicides were extracted with 0.1% (volume percentage) acetic acid-acetonitrile, and cleaned-up with 100 mg primary secondary amine (PSA) and 100 mg C₁₈. The separation was performed on a C₁₈ column with methanol and water as the mobile phases. The strobilurin fungicides were determined in the positive ion mode and multiple reaction monitoring mode. The quantification was carried out by the matrix-matched external standard curve. The results showed good linear relationships for all analytes in the range of 0.1-100 μg/kg with the correlation coefficients of 0.9805-0.9999. The mean recoveries of strobilurin fungicides in the spiked soil samples were 65.1%-103.9% and the relative standard deviations were 0.082%-14% (n=3) at three spiked levels (5, 10 and 50 μg/kg). The limits of quantitation were 0.005-2.0 μg/kg. This method is suitable for the trace determination of the 11 strobilurin fungicides in different vegetation types of soil (black soil, red soil, sandy soil, moisture soil, desert grey soil, and plateau soil).

Key words: QuEChERS, soil, strobilurin fungicides, ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)

CLC Number:

O658

WANG Lu-fang, LI Chun-mei, XU Jiabin, LI Hui, SU Hang, WANG Jing, JIN Fen, ZHANG Yu. Simultaneous determination of 11 strobilurin fungicides in different vegetation types of soil by QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2018, 36(8): 730-737.

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