Comparative study of different clean-up techniques for the determination of λ-cyhalothrin and cypermethrin in palm oil matrices by gas chromatography with electron capture detection

Muhamad, H. and Zainudin, B.H. and Abu Bakar, N.K. (2012) Comparative study of different clean-up techniques for the determination of λ-cyhalothrin and cypermethrin in palm oil matrices by gas chromatography with electron capture detection. Food Chemistry, 134 (4). pp. 2489-2496. ISSN 03088146

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Abstract

Solid phase extraction (SPE) and dispersive solid-phase extraction (d-SPE) were compared and evaluated for the determination of λ-cyhalothrin and cypermethrin in palm oil matrices by gas chromatography with an electron capture detector (GC-ECD). Several SPE sorbents such as graphitised carbon black (GCB), primary secondary amine (PSA), C 18, silica, and florisil were tested in order to minimise fat residues. The results show that mixed sorbents using GCB and PSA obtained cleaner extracts than a single GCB and PSA sorbents. The average recoveries obtained for each pesticide ranged between 81 and 114 at five fortification levels with the relative standard deviation of less than 7 in all cases. The limits of detection for these pesticides were ranged between 0.025 and 0.05 μg/g. The proposed method was applied successfully for the residue determination of both λ-cyhalothrin and cypermethrin in crude palm oil samples obtained from local mills throughout Malaysia.

Item Type: Article
Uncontrolled Keywords: Dispersive solid phase extraction, Gas chromatography electron capture, detector, Palm oil, Pesticide residues, Solid phase extraction, Gas chromatography-electron capture, detector, Pesticide residue, Solid-phase extrction, Carbon black, Pesticides, Silica, Vegetable oils, Gas chromatography, carbon 18, cipermethrin, cyhalothrin, graphitised carbon black, magnesium trisilicate, primary secondary amine, silicate, sorbent, unclassified drug, article, comparative study, electron capture detection, extraction and extracts, food analysis, food biotechnology, food contamination, food industry, food quality, food safety, validation process,
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: miss munirah saadom
Date Deposited: 02 Jul 2013 01:37
Last Modified: 02 Jul 2013 01:37
URI: http://eprints.um.edu.my/id/eprint/6240

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