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Citation: YU Teng-Hui, LIU Xing-Xing, DENG Min, FANG Xiao-Wei, CHEN Lin-Fei, GUO Xia-Li, LUO Li-Ping. Direct Detection of Dichlorvos in Honey by Neutral Desorption-Extractive Electrospray Ionization Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(9): 1432-1436. doi: 10.11895/j.issn.0253-3820.150968 shu

Direct Detection of Dichlorvos in Honey by Neutral Desorption-Extractive Electrospray Ionization Mass Spectrometry

1.
School of Life Sciences, Nanchang University, Nanchang 330031, China
2.
Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, China

Received Date: 8 December 2015
Revised Date: 26 June 2016

Fund Project: This study was supported by the National Natural Science Foundation of China (No.31370384), the International Science and Technical Cooperation Program of Jiangxi Province (No.20121BDH80020), and the 12th Five-rural Areas of the National Science and Technology Plan Project (No.2012BDA29B01).

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In this study, a neutral desorption-extractive electrospray ionization mass spectrometry (ND-EESI-MS) method was developed for the direct and rapid detection of dichlorvos (DDVP) in honey samples without any sample pretreatment procedure. Under the positive ionization mode, the main characteristic parent ion of DDVP was m/z 223 (M_W: 222) and daughter ions were m/z 109 and m/z127. Under the optimized working conditions, with the signal intensity of m/z 127 as quantitative index, the quantitative information of DDVP residues in honey was acquired effectively. The results showed that the linear range of DDVP for spiked honey was 5-1000 ng/mL (R²=0.998) with the limit of detection (LOD) of 1.0 ng/mL (n=3) and the recoveries for the DDVP spiked honey samples at the concentration levels of 10, 30 and 400 ng/mL were 93.0%-103.0%, with the relative standard deviations (RSDs, n=6) of less than 4.4%. Meanwhile, for detection of spiked honey with gas chromatography-flame photometric detector (GC-FPD), the linear range was 5-1000 ng/mL (R²=0.999) with the LOD of 1.6 ng/mL(n=3), and the recoveries of DDVP at the spiked honey concentration levels of 10, 30 and 400 ng/mL were 94.9%-110.3%, with the RSDs of less than 7.6%.
- Neutral desorption-extractive electrospray ionization,
- Mass spectrometry,
- Dichlorvos,
- Honey,
- Direct detection
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1.
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