Simultaneous quantification of insecticides including carbaryl in drinking water by gas chromatography using dual electron-capture and nitrogen-phosphorus detection.
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 approximately 1.000. The method was sensitive, reproducible and simple enough to permit the reliable routine analysis of the pesticides in drinking water.
Oh-Shin
Y S
YS
Korea Water Works Institute, Yungdungpo-Gu, Seoul, South Korea.
Ko
M
M
Shin
H S
HS
D012721:Carbaryl / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D004583:Electrons; D005466:Fluorocarbons / Q000378:metabolism; D007306:Insecticides / Q000032:analysis*; D007700:Kinetics; D013058:Mass Spectrometry; D015394:Molecular Structure; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D015203:Reproducibility of Results; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis*
D005466:Fluorocarbons; D007306:Insecticides; D014873:Water Pollutants; D014867:Water; C068048:pentafluoropropionic anhydride; D010758:Phosphorus; D009584:Nitrogen; D012721:Carbaryl