Abstract
A simple and rapid microwave assisted extraction (MAE) method is presented for the determination of atrazine and four organophosphorus pesticides (parathion-methyl, chlorpyriphos, fenamiphos and methidathion) in orange peel. The experimental variables that affect the MAE method, such as temperature, sample quantity, extraction time, nature and volume of organic solvents, were optimized. The MAE method was optimized using an experimental design. The results suggest that temperature and sample quantity are statistically significant factors. It was concluded that the five pesticides could be efficiently extracted from 1.5–2.5 g of orange peel with 10 mL of hexane/acetone (1 : 1) mixture at 90 °C in 9 min with microwave power set at 50% (475 W). After optimization these factors, recoveries ranged from 93 to 101% with a relative standard deviation ranging from 1 to 3%. The extracts were analyzed by gas chromatography with a nitrogen-phosphorus detector (GC-NPD).
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 2 December 1999 / Revised: 28 January 2000 / Accepted: 1 February 2000
Rights and permissions
About this article
Cite this article
Bouaid, A., Martín-Esteban, A., Fernández, P. et al. Microwave-assisted extraction method for the determination of atrazine and four organophosphorus pesticides in oranges by gas chromatography (GC). Fresenius J Anal Chem 367, 291–294 (2000). https://doi.org/10.1007/s002160000363
Issue Date:
DOI: https://doi.org/10.1007/s002160000363