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Determination of multiclass pesticide residues in apple juice by gas chromatography–mass spectrometry with large-volume injection

✍ Scribed by Jian-Hua Wang; Yi-Bing Zhang; Xiu-Lin Wang

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
646 KB
Volume
29
Category
Article
ISSN
1615-9306

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✦ Synopsis

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 μL) 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).

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