Determination of 4 Aflatoxins and 11 Pesticide Residues in Peanut by Ultrahigh Performance Liquid Chromatography-Quadrupole/Electrostatic Field Orbitrap High Resolution Mass Spectrometry
胡巧茹, 丛中笑, 沙美兰, 曹鹏, 梁君妮, 李晓玉, 关丽丽, 谢爽. Determination of 4 Aflatoxins and 11 Pesticide Residues in Peanut by Ultrahigh Performance Liquid Chromatography-Quadrupole/Electrostatic Field Orbitrap High Resolution Mass Spectrometry[J]. 2019, 38(4): 396-402.
胡巧茹, 丛中笑, 沙美兰, 曹鹏, 梁君妮, 李晓玉, 关丽丽, 谢爽. Determination of 4 Aflatoxins and 11 Pesticide Residues in Peanut by Ultrahigh Performance Liquid Chromatography-Quadrupole/Electrostatic Field Orbitrap High Resolution Mass Spectrometry[J]. 2019, 38(4): 396-402.DOI: doi:10.3969/j.issn.1004-4957.2019.04.004.
A method was developed for the determination of 4 aflatoxins and 11 pesticide residues in peanut by ultrahigh performance liquid chromatography-quadrupole/electrostatic field orbitrap high resolution mass spectrometry(UPLC-HRMS).The samples were extracted with acetonitrile-water-acetic acid(84∶15∶1,by volume)
and the extracts were cleaned up with 1.0 g MgSO4
100 mg PSA and 400 mg C18.The analytes were separated on a Hypersil Gold C18 column(100 mm×2.1 mm,1.9 μm)
and quantified by UPLC-HRMS.Results showed that 4 aflatoxins and 11 pesticide residues had good linear relationships in their respective mass concentration ranges with their correlation coefficients(r2)more than 0.996.The limits of quantitation(LOQs)of the method ranged from 0.25 μg/kg to 1.0 μg/kg.The spiked recoveries for 4 aflatoxins and 11 pesticide residues at three spiked levels ranged from 79.4%to 120%with relative standard deviations(RSD
n=6) of 4.2%-10%.With the advantages of high sensitivity and reliability
the method was suitable for the simultaneous determination of 4 aflatoxins and 11 pesticide residues in peanut.