Determination of pesticide residues in leafy vegetables at parts per billion levels by a chemometric study using GC-ECD in Cameron Highlands, Malaysia

Yang Farina Abdul Aziz, Md. Pauzi Abdullah, Nusrat Bibi, Wan Mohd Afiq Wan Mohd Khalik

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A simple and sensitive analytical method has been developed employing gas chromatography coupled with electron capture detector (GC-ECD), and validated for screening and quantification of 15 pesticide residues at trace levels in cabbage, broccoli, cauliflower, lettuce, celery, spinach, and mustard. The method consists of two steps, first, to determine the significance of each factor by Pareto chart followed by optimization of these significant factors using central composite design (CCD). Minitab statistical software was used for these multivariate experiments for the generation of 24-1 design and CCD matrices. The method evaluation was done by external standard calibration with linearity range between 0.5 and 3mg/kg, with correlation coefficient 0.99, limit of detection (LOD) ranges between 0.02 and 4.5ng/g, and limit of quantification (LOQ) ranges between 0.2 and 45ng/g. The average recovery was between 60% and 128%, with RSD 0.2-19.8%. The method was applied on real vegetable samples from Cameron Highlands.

Original languageEnglish
Pages (from-to)55-61
Number of pages7
JournalFood Chemistry
Volume224
DOIs
Publication statusPublished - 1 Jun 2017

Fingerprint

Pesticide Residues
chemometrics
Malaysia
green leafy vegetables
Vegetables
pesticide residues
Gas chromatography
Gas Chromatography
detectors
Brassica
highlands
gas chromatography
electrons
Electrons
Detectors
celery
cauliflower
Apium graveolens
Composite materials
broccoli

Keywords

  • GC-ECD/GC–MS
  • Pesticide residues
  • Vegetables

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science
  • Medicine(all)

Cite this

Determination of pesticide residues in leafy vegetables at parts per billion levels by a chemometric study using GC-ECD in Cameron Highlands, Malaysia. / Abdul Aziz, Yang Farina; Abdullah, Md. Pauzi; Bibi, Nusrat; Khalik, Wan Mohd Afiq Wan Mohd.

In: Food Chemistry, Vol. 224, 01.06.2017, p. 55-61.

Research output: Contribution to journalArticle

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