title: Determination of multiclass pesticide residues in apple juice by gas chromatography-mass spectrometry with large-volume injection.
abstract: 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).
authors.affiliation: Shandong Exit & Entry, Inspection and Quarantine Bureau, Qingdao, Shandong, P. R. China. wangjianhua9@yahoo.com
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Wang
authors.forename: Yi-Bing
authors.initials: YB
authors.lastname: Zhang
authors.forename: Xiu-Lin
authors.initials: XL
authors.lastname: Wang
mesh_terms: 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
chemical_list: D010573:Pesticide Residues