title: Simultaneous multiresidue determination of 48 pesticides in Yeongsan and Sumjin River water using GC-NPD and confirmation via GC-MS.
abstract: In a continuation of our earlier work, a multiresidual analytical method using 48 frequently used neutral pesticides in a water matrix was developed and validated in this study. The samples were extracted with dichloromethane and the pesticides were analyzed via GC-NPD followed by confirmation with GC-MS. Good linearity was detected over a concentration range of 0.01-1.0 microg/mL with correlation coefficients (r(2) ) in excess of 0.982. The recoveries were measured between 70.7 and 111.4% for the majority of the targeted pesticides with relative standard deviations (RSDs) of less than 20%. The LODs and LOQs were in ranges of 0.1-2 and 0.33-6.6 microg/L, respectively. A total of 66 water samples were collected from different locations in Yeongsan and the Sumjin River, Republic of Korea, and were analyzed in accordance with the developed method. None of the water samples were determined to contain any of the targeted pesticides. The method has been shown to be simpler, faster, and more cost-effective than the method established by the Environmental Protection Agency (EPA).
authors.affiliation: Natural Products Chemistry Laboratory, 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: Woo Jung
authors.initials: WJ
authors.lastname: Choi
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: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D008752:Methylene Chloride; D010573:Pesticide Residues / Q000032:analysis* / Q000737:chemistry; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry*; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D010573:Pesticide Residues; D010575:Pesticides; D014874:Water Pollutants, Chemical; D008752:Methylene Chloride