The Malaysian Journal of Analytical Sciences Vol 12 No 3 (2008): 570 – 574

 

 

 

DOUBLE-PHASE LIQUID MEMBRANE EXTRACTION FOR THE ANALYSIS OF PESTICIDES

 

Mohd Marsin Sanagi*, Nurul Auni Zainal Abidin, See Hong Heng, Wan Aini Wan Ibrahim

 

Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia

81310 UTM Skudai, Johor, Malaysia.

 

*Corresponding author: marsin@kimia.fs.utm.my

 

 

Abstract

A simple and solvent minimized sample preparation technique based on two-phase hollow fiber-protected  liquid-phase microextraction was investigated for HPLC analysis of selected pesticides in water samples. Four pesticides (procymidon, methidation, quinalphos, and vinclozolin) were considered as target analytes. Parameters such  as  extraction solvent, salt concentration, stirring speed, extraction time, and pH value were optimized using  spiked deionised water samples. The analytes were extracted from 12 mL water samples through organic solvent (n-hexane and isooctane) immobilized in the pores  of  a  porous  polypropylene  hollow  fiber  into  50  µL acceptor  phase  present  inside  the  hollow  fiber.  Excellent separations of analytes were obtained on C18 column using acetonitrile-water ratio of 55:45 v/v at elevated flow rate of 0.8 mL/min.

 

Keywords: Membrane extraction, Liquid-phase Microextraction

 

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