Determination of the herbicide fluroxypyr in oil matrices

Halimah B. Muhamad, Tan Yew Ai, Ismail Sahid

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The purpose of this study was to develop a method for the determination of fluroxypyr (4-amino-3,5-dichloro-6-fluro2-pyridyloxyacetic acid) residue in palm oil namely crude palm oil (CPO) and crude palm kernel oil (CPKO). The method involves the extraction of the herbicide from the oil matrix followed by low temperature precipitation and finally quantification of the residues using the high performance liquid chromatography (HPLC). The extraction efficiency of the method was evaluated by conducting recovery studies. The recovery of fluroxypyr from the fortified CPO samples ranged from 78%-111% with the relative values for the coefficient of variation ranging from 1.4 to 8.6%. Furthermore, the recovery of fluroxypyr from the spiked CPKO samples ranged from 91-107% with the relative values for the coefficient of variation ranging from 0.6 to 4.5%. The minimum detection limit of fluroxypyr in CPO and CPKO was 0.05 μg/g. The method was used to determine fluroxypyr residues from the field-treated samples of CPO and CPKO. When fluroxypyr was used for weed control in oil palm plantations no residue was detected in CPO and CPKO irrespective of the sampling interval and the dosage applied at the recommended or double the manufacturer's recommended dosage.

Original languageEnglish
Pages (from-to)134-140
Number of pages7
JournalJournal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes
Volume43
Issue number2
DOIs
Publication statusPublished - Feb 2008

Fingerprint

fluroxypyr
Palm oil
Herbicides
palm kernel oil
palm oils
herbicide
Oils
herbicides
oils
matrix
oil
crude oil
Petroleum
sampling
Elaeis guineensis
Recovery
dosage
methodology
palm oil
4,5-amino-3,5-dichloro-6-fluoro-2-pyridinyloxyacetic acid

Keywords

  • Crude palm kernel oil
  • Crude palm oil
  • Fluroxypyr
  • Herbicide

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Public Health, Environmental and Occupational Health
  • Waste Management and Disposal

Cite this

Determination of the herbicide fluroxypyr in oil matrices. / Muhamad, Halimah B.; Ai, Tan Yew; Sahid, Ismail.

In: Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes, Vol. 43, No. 2, 02.2008, p. 134-140.

Research output: Contribution to journalArticle

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