Simultaneous quantification of insecticides including carbaryl in drinking water by gas chromatography using dual electron-capture and nitrogen–phosphorus detection

• Published in: Journal of Chromatography A Vol. 769; no. 2; pp. 285 - 291
• Main Authors: Oh-Shin, Yun-Suk, Ko, Moonhee, Shin, Ho-Sang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 09.05.1997; Elsevier
• Subjects: Analysis methods; Analytical chemistry; Applied sciences; Carbaryl; Carbaryl - analysis; Chemistry; Chromatographic methods and physical methods associated with chromatography; Chromatography, Gas - methods; Electrons; Exact sciences and technology; Fluorocarbons - metabolism; Gas chromatographic methods; Insecticides - analysis; Kinetics; Mass Spectrometry; Molecular Structure; Natural water pollution; Nitrogen - analysis; Pesticides; Phosphorus - analysis; Pollution; Reproducibility of Results; Temperature; Water - chemistry; Water Pollutants - analysis; Water treatment and pollution; Environmental analysis; Carbaryl; Water analysis; Pesticides; Parathion; Electron capture detector; Drinking water; Chemical analysis; Insecticide; Fenitrothion; Malathion; Carbaryl(pesticide); Organic carbamate; Diazinon; Gas chromatography; Multicomponent analysis; Simultaneous measurement; Organophosphorus compounds; Water pollution; Quantitative analysis
• ISSN: 0021-9673
• DOI: 10.1016/S0021-9673(97)00005-8

A rapid and simple gas chromatographic method for the simultaneous determination of malathion, parathion, fenitrothion, diazinon and carbaryl in drinking water is presented. A fused-silica SE-54 column was used for the separation of the insecticides and was split into two specific detectors; electron-capture and nitrogen–phosphorus detectors by using column switching. A water sample was extracted with methylene chloride. The organic phase was evaporated and the residue was derivatized with pentafluoropropionic acid anhydride. The detection limit was below 0.1 ng/ml and the calibration curves showed good linearity with r=0.998∼1.000. The method was sensitive, reproducible and simple enough to permit the reliable routine analysis of the pesticides in drinking water.