Determination of pesticides in soil by liquid-phase microextraction and gas chromatography-mass spectrometry

Journal of Chromatography. a
Li Hou, Hian Kee Lee

Abstract

Trace amounts of pesticides in soil were determined by liquid-phase microextraction (LPME) coupled to gas chromatography-mass spectrometry (GC-MS). The technique involved the use of a small amount (3 microl) of organic solvent impregnated in a hollow fiber membrane, which was attached to the needle of a conventional GC syringe. The organic solvent was repeatedly discharged into and withdrawn from the porous polypropylene hollow fiber by a syringe pump, with the pesticides being extracted from a 4 ml aqueous soil sample into the organic solvent within the hollow fiber. Aspects of the developed procedure such as organic solvent selection, extraction time, movement pattern of plunger, concentrations of humic acid and salt, and the proportion of organic solvent in the soil sample, were optimized. Limits of detection (LOD) were between 0.05 and 0.1 microg/g with GC-MS analysis under selected-ion monitoring (SIM). Also, this method provided good precision ranging from 6 to 13%; the relative standard deviations were lower than 10% for most target pesticides (at spiked levels of 0.5 microg/g in aqueous soil sample). Finally, the results were compared to those achieved using solid-phase microextraction (SPME). The results demonstrated t...Continue Reading

References

Aug 15, 2000·Journal of Chromatography. a·J BeltranF Hernández
Dec 13, 2000·Rapid Communications in Mass Spectrometry : RCM·M N SarriónM T Galceran
Feb 24, 2001·Journal of Chromatography. a·E Psillakis, N Kalogerakis
Mar 28, 2001·Journal of Chromatography. a·R BaciocchiM R Boni
Jan 5, 2002·Analytical Chemistry·A L TheisM A Jeannot
Feb 13, 2002·Analytical Chemistry·Gang Shen, Hian Kee Lee
Dec 20, 2002·Journal of Chromatography. a·Stephanie KingAnthony R J Andrews

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Citations

Feb 27, 2008·Analytical and Bioanalytical Chemistry·Bartosz Wielgomas, Wojciech Czarnowski
Aug 12, 2009·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Rie ItoHiroyuki Nakazawa
May 27, 2014·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Helena Prosen
Dec 3, 2016·Journal of Chromatographic Science·Ali Mohamed Ali AlsharifAbubakar Lawal
Aug 8, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Pengcheng NieFangfang Qu
Mar 8, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Angela SantilioRoberto Dommarco
Sep 12, 2009·Journal of Separation Science·Mir Ali FarajzadehMehdi Bamorowat
Nov 9, 2004·Journal of Mass Spectrometry : JMS
Dec 12, 2012·Journal of Separation Science·Lukman Bola Abdulra'ufGuan Huat Tan
May 29, 2014·Environmental Science and Pollution Research International·Liina KanarbikAnne Kahru
Dec 13, 2005·Journal of Chromatography. a·Christian DietzCarmen Cámara

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