Analysis of organochlorine pesticides using solid-phase microextraction.
A solid-phase microextraction (SPME) procedure has been developed to successfully extract eighteen chlorine-containing pesticides from water. A fused-silica fiber coated with a non-polar polydimethylsiloxane stationary phase was used to extract the analytes from water samples over a concentration range of 0.001 to 100 ng/ml. Limits of detection at a ng/l level were achieved with GC and flame ionization detection, and improved to sub ng/l levels using GC-MS, or GC with electron-capture detection (ECD). The reproducibility of the measurements between fibers was found to be very good, with precision typically below 20% R.S.D. within a single fiber. Qualitative analysis was performed on river and lake samples from Southern Ontario. Samples from the Arctic region of Canada were analyzed quantitatively using a dual ECD system.
Magdic
S
S
The Guelph-Waterloo Centre for Graduate Work in Chemistry, University of Waterloo, Ontario, Canada.
Pawliszyn
J B
JB
D001110:Arctic Regions; D002170:Canada; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002849:Chromatography, Gas / Q000379:methods* / Q000706:statistics & numerical data; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods / Q000706:statistics & numerical data; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D009994:Osmolar Concentration; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012965:Sodium Chloride; D014867:Water / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*
D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D014873:Water Pollutants; D014867:Water; D012965:Sodium Chloride