Determination of Chlorpyrifos Residues in Cherry Samples by Direct Immersion Solid Phase Microextraction Coupled with Gas Chromatography Mass Spectrometry

Authors : Oya AYDIN URUCU, Ece KÖK YETİMOĞLU, Deniz DEVECİOĞLU

Pages : 398-402

Doi:10.7240/marufbd.398657

View : 17 | Download : 8

Publication Date : 2018-12-31

Article Type : Research Paper

Abstract :A method based on a solid phase microextraction gas chromatography- mass spectrometry insert ignore into journalissuearticles values(SPME-GC/MS); was developed for the quantitative determination of chlorpyrifos residues in cherry samples. Three kinds of fiber coatings: PA insert ignore into journalissuearticles values(polyacrylate, 85µm);, PDMS–DVB insert ignore into journalissuearticles values(polydimethylsiloxane–divinylbenzene 65 mm); and PDMS insert ignore into journalissuearticles values(polydimethylsiloxane, 100 mm); were compared. Various parameters affecting SPME procedures such as temperature, extraction and desorption times, salinity, stirring rate were investigated. The analytes from all sample extracts were preconcentrated for 30 minutes in the SPME fiber at 60 °C and then the fiber was desorbed by heating at 250 °C for 10 minutes in the gas chromatography injection port. Limits of detection insert ignore into journalissuearticles values(LOD); and quantitation insert ignore into journalissuearticles values(LOQ); values were 0.03 µg/L and 0,1 µg/L, respectively. An average recovery range was 93-98% with relative standard deviation insert ignore into journalissuearticles values( RSD); < 10 %.
Keywords : Fiber, Pesticides, Sample handing