Citation:
JIANG Li-Yan, ZHAO Qi-Yang, GONG Lei, LIU Yan-Yu, ZHANG Yao-Hai, MA Liang, JIAO Bi-Ning. Rapid Determination of Five Alternaria Mycotoxins in Citrus by Ultra-high Performance Liquid Chromatography-Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry,
;2015, 43(12): 1851-1858.
doi:
10.11895/j.issn.0253-3820.150370
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A novel method was developed for the rapid determination of five alternaria mycotoxins, alternariol, alternariol monomethyl ether, altenuene, tentoxin and tenuazonic acid, in citrus using ultra-high performance liquid chromatography-tandem mass spectrometry. The sample was prepared using the modified QuEChERS(quick, easy, cheap, effective, rigged, and safe) method to complete the extraction and clean-up steps in one procedure. In this QuEChERS method, sample was extracted with acetonitrile(1.5% formic acid), then salted out with anhydrous MgSO4 and NaCl, separated on an ACQUITY UPLC BEH C18 with gradient elution by using acetonitrile and 0.1% formic acid aqueous as eluant, and detected by UPLC-MS/MS under negative(ESI+) electrospray ionization and MRM models. Under these conditions, five alternaria mycotoxins made a good linearity in the concentration range of 2.0-100μg/L with R2>0.9922, and the limits of detection of the instrument were in the range of 0.11-0.91μg/kg. Three spiked levels of five altenaria mycotoxins at 5, 20 and 100μg/kg were investigated, and the recoveries ranged from 71% to 112% with the relative standard deviations(RSDs) varying from 1.1% to 9.9%, which met the requirement of mycotoxins determination.
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