领学术科研之先，创食品科技之新
—— 中国食品杂志社
To effectively assess the extent of the mycotoxin contamination of grapes, a method was developed to analyze 22 mycotoxins by ultra-high-performance liquid chromatography coupled with quadrupole/orbitrap high-resolution mass spectrometry (UPLC-Q-Orbitrap HRMS). Samples were extracted and purified using the QuEChERS (quick, easy, cheap, effective, rugged, and safe) procedure. The extracts were separated on a BEH Shield C18 column (100 mm × 2.1 mm, 1.7 μm), using methanol and water with 0.1% formic acid solution and 2 mmol/L ammonium acetate as the mobile phases. The quantification was performed according to a matrix-matched external standard method. There was a good linear relationship within the respective mass concentration ranges of 22 mycotoxins; the correlation coefficients were not less than 0.998 1. The limit of quantification was 0.3–10.0 μg/kg. Mycotoxin recovery ranged from 68.6% to 109.0%, with a relative standard deviation of 1.28%–12.80%. The method is simple, rapid, highly sensitive, and accurate, making it useful for screening grapes for common and emerging mycotoxins.
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