期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2011
卷号：12
期号：1
页码：76-87
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：A very sensitive analytical method for the determination of 26 pesticides in some fruits based on solid phase extraction (SPE) cleanup was developed using gas chromatography (GC) coupled with micro electron capture detector (ÏECD). The identity of the pesticides was confirmed by gas chromatography mass spectroscopy (GC-MS) using selected ion monitoring (SIM) mode. Ethyl acetate was used as a solvent for the extraction of pesticide residues with assistance of sonication. For cleanup an octadecyl,C18 SPE column was used. A linear response of ÏECD was observed for all pesticides with good correlation coefficients (>0.9992). Proposed method was successfully applied for the determination of pesticide residues in the orange,apple,and grape fruits. Average recoveries achieved for all of the pesticides at fortification levels of 0.05,1.0 and 2.0 Ïg g -1 in analyzed fruits were above 90% with relative standard deviations (RSD) less than 6%..
