Direct Detection of Dichlorvos in Honey by Neutral Desorption-Extractive Electrospray Ionization Mass Spectrometry
10.11895/j.issn.0253-3820.150968
- VernacularTitle:中性解吸电喷雾萃取电离质谱法直接检测蜂蜜中的敌敌畏
- Author:
Tenghui YU
;
Xingxing LIU
;
Min DENG
;
Xiaowei FANG
;
Linfei CHEN
;
Xiali GUO
;
Liping LUO
- Publication Type:Journal Article
- Keywords:
Neutral desorption-extractive electrospray ionization;
Mass spectrometry;
Dichlorvos;
Honey;
Direct detection
- From:
Chinese Journal of Analytical Chemistry
2016;44(9):1432-1436
- CountryChina
- Language:Chinese
-
Abstract:
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 (MW: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%.
