Determination of multiclass pesticide residues in apple juice by gas chromatography-mass spectrometry with large-volume injection.
This study presents two GC-MS SIM methods, in combination with large-volume injection programmed-temperature vaporization (LVI-PTV) injection, for the determination of 141 pesticide residues in apple juice. The sample was extracted with ACN, and coextractives were removed with primary/secondary amine sorbent. ACN extract (20 microL) was injected into a PTV injection port in solvent vent mode, and the pesticides were determined by GC-MS using retention time locking software. Deuterium-labeled pesticides (surrogate standards) were used for analytical quality control. In the validation experiments, pesticides recoveries were found to be 70-121% with RSDs of 4.6-21% (n = 6).
Wang
Jian-Hua
JH
Shandong Exit & Entry, Inspection and Quarantine Bureau, Qingdao, Shandong, P. R. China. wangjianhua9@yahoo.com
Zhang
Yi-Bing
YB
Wang
Xiu-Lin
XL
D001628:Beverages / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D027845:Malus / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis* / Q000145:classification
D010573:Pesticide Residues