Multiresidue analysis of pesticides in fruits and vegetables using solid-phase extraction and gas chromatographic methods

Asha Lal, Guanhuat Tan, Mee Kin Chai

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A new extraction and cleanup procedure with gas chromatography was developed for the sensitive determination of acephate, dimethoate, malathion, diazinon, quinalphos, chlorpyrifos, profenofos, α-endosulfan, β-endosulfan, chlorothalonil and carbaryl using 1-chloro-4-fluorobenzene as an internal standard in fruits and vegetables. Several extracting and eluting solvents for solid-phase extraction were investigated. The overall extracting solvent with a mixture of acetone:ethyl acetate:hexane (10:80:10, v/v/v) and a eluting solvent of 5% acetone in hexane used with the RPC18 cartridge gave the best recovery for all of the investigated pesticides, and minimized the interference from co-extractants. Under the optimal extraction and clean-up conditions, recoveries of 85 - 99% with RSD < 5.0% (n = 3) for most of the pesticides at the 0.02-0.5 mg/kg level were obtained. The limit of detection was between 0.005-0.01 mg/kg and the limit of quantification was 0.01 mg/kg. This analytical procedure was characterized with high accuracy and acceptable sensitivity to meet requirements for monitoring pesticides in crops. 2008

Original languageEnglish
Pages (from-to)231-236
Number of pages6
JournalAnalytical Sciences
Volume24
Issue number2
DOIs
Publication statusPublished - 01 Feb 2008

Fingerprint

Vegetables
Fruits
Pesticides
Endosulfan
acephate
tetrachloroisophthalonitrile
Gases
Hexanes
Acetone
Fluorobenzenes
Dimethoate
Diazinon
Carbaryl
Malathion
Chlorpyrifos
Recovery
Gas chromatography
Crops
Monitoring

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

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Multiresidue analysis of pesticides in fruits and vegetables using solid-phase extraction and gas chromatographic methods. / Lal, Asha; Tan, Guanhuat; Chai, Mee Kin.

In: Analytical Sciences, Vol. 24, No. 2, 01.02.2008, p. 231-236.

Research output: Contribution to journalArticle

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