Determination of multiclass pesticide residues in apple juice by gas chromatography-mass selective detection after extraction by matrix solid-phase dispersion.
A multiresidue method is described for the analysis of 106 multiclass pesticides (organochlorine, organophosphate, carbamate, pyrethroid, and triazine classes) in apple juice in a single injection. The determination procedure was based on matrix solid-phase dispersion of juice on diatomaceous earth in a glass column and subsequent extraction with a mixture of hexane-dichloromethane (1 + 1) at a flow rate of 5 mL/min. The analytes were determined by capillary gas chromatography with mass spectrometric detection and confirmed by their retention times and ion ratios. The coefficients of variation for analysis of samples fortified over the range of 0.01-0.2 mg/kg were 1.62 to 18.4%, and the recoveries for all analytes were between 70 and 110%.
Hu
Xiaozhong
X
Technology Center for Hubei Entry-Exit Inspection and Quarantine Bureau, Wansongyuan Rd, Wuhan, Hubei, China. huxz2002@sohu.com
Jianxin
Yu
Y
Zhigang
Yan
Y
Lansun
Ni
N
Yanfei
Lin
L
Peng
Wang
W
Jing
Li
L
Xin
Huang
H
Xiaogang
Chu
C
Yibin
Zhang
Z
D001628:Beverages / Q000032:analysis*; D002138:Calibration; D008401:Gas Chromatography-Mass Spectrometry; D007202:Indicators and Reagents; D027845:Malus / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results
D007202:Indicators and Reagents; D010573:Pesticide Residues