Solid-phase microextraction of organophosphate pesticides in source waters for drinking water treatment facilities.
The rapid detection of contaminants in our nation's drinking water has become a top homeland security priority in this time of increased national vigilance. Real-time monitoring of drinking water for deliberate or accidental contamination is key to national security. One method that can be employed for the rapid screening of pollutants in water is solid-phase microextraction (SPME). SPME is a rapid, sensitive, solvent-free system that can be used to screen for contaminants that have been accidentally or intentionally introduced into a water system. A method using SPME has been developed and optimized for the detection of seven organophosphate pesticides in drinking water treatment facility source waters. The method is tested in source waters for drinking water treatment facilities in Mississippi and Alabama. Water is collected from a deepwater well at Stennis Space Center (SSC), MS, the drinking water source for SSC, and from the Converse Reservoir, the main drinking water supply for Mobile, AL. Also tested are samples of water collected from the Mobile Alabama Water and Sewer System drinking water treatment plant prior to chlorination. The method limits of detection for the seven organophosphates were comparable to those described in several Environmental Protection Agency standard methods. They range from 0.25 to 0.94 microg/L.
Flynt
Elizabeth
E
U.S. Environmental Protection Agency/Office of Prevention, Pesticides and Toxic Substances/Office of Pesticide Programs/Biological and Economic Analysis Division/Environmental Chemistry Laboratory, Stennis Space Center, MS 39529-6000, USA. purmahia@udc.es
Dupuy
Aubry
A
Kennedy
Charles
C
Bennett
Shanda
S
D009943:Organophosphorus Compounds / Q000302:isolation & purification*; D009994:Osmolar Concentration; D010575:Pesticides / Q000302:isolation & purification*; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014881:Water Supply / Q000032:analysis*
D009943:Organophosphorus Compounds; D010575:Pesticides; D014874:Water Pollutants, Chemical