title: Development and validation of a multiresidue method for determination of 37 pesticides in soil using GC-NPD.
abstract: In this study, a multiresidue analytical method for the detection of 37 pesticides in a soil matrix was developed and validated. The soil sample was fortified with a known quantity of pesticides at two different concentration levels (0.1 and 0.01 µg/g) and the analytes were extracted via a liquid-solid extraction method. The pesticides were separated on an HP5 capillary column and were analyzed with a gas chromatograph coupled to a nitrogen-phosphorous detector (GC-NPD). Method validation was accomplished with good linearity (r(2) = 0.994-0.999) within a considerable range of concentrations. Satisfactory recoveries (70.5-110.4%) were obtained with 32 pesticides at both spiking concentration levels, whereas five pesticides-dimepiperate, buprofezin, prometryn, pirimicarb, and fludioxonil-were recovered at relatively low levels (43.6-61.8%). The applicability of the method was demonstrated by analyzing field samples collected from 24 different sites around Yeongsan and Sumjin rivers in the Republic of Korea. No residues of the selected pesticides were detected in any of the samples. The developed method could be employed as a simple and cost-effective method for the routine detection and analysis of 37 pesticides in soil samples.
authors.affiliation: Natural Products Chemistry Lab, Department of Biological Chemistry, College of Agriculture and Life Science, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea.
authors.forename: Jong Hyouk
authors.initials: JH
authors.lastname: Park
authors.forename: Md Iqbal Rouf
authors.initials: MI
authors.lastname: Mamun
authors.forename: A M
authors.initials: AM
authors.lastname: Abd El-Aty
authors.forename: Tae Woong
authors.initials: TW
authors.lastname: Na
authors.forename: Jeong-Heui
authors.initials: JH
authors.lastname: Choi
authors.forename: M W
authors.initials: MW
authors.lastname: Ghafar
authors.forename: Kap Soon
authors.initials: KS
authors.lastname: Kim
authors.forename: Sang Don
authors.initials: SD
authors.lastname: Kim
authors.forename: Jae-Han
authors.initials: JH
authors.lastname: Shim
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D010573:Pesticide Residues; D012989:Soil Pollutants