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Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume 44,
Number 8, September 2006, pp. 484-488
Solid-Phase Microextraction of Organophosphate
Pesticides in Source Waters for Drinking Water Treatment Facilities
Elizabeth Flynt, Aubry Dupuy, Jr., Charles Kennedy,
and Shanda Bennett
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
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 µg/L.
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