Kansas Water Science Center
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Detection of Pesticides and Pesticide Metabolites Using the Cross Reactivity of Enzyme ImmunoassaysBy E.M. Thurman, and D.S. AgaAbstractEnzyme immunoassay is an important environmental analysis method that may be used to identify many pesticide analytes in water samples. Because of similarities in chemical structure between various members of a pesticide class, there often may be an unwanted response that is characterized by a percentage of cross reactivity. Also, there may be cross reactivity caused by degradation products of the target analyte that may be present in the sample. In this paper, the concept of cross reactivity caused by degradation products or by nontarget analytes is explored as a tool for identification of metabolites or structurally similar compounds not previously known to be present in water samples. Two examples are examined in this paper from various water quality studies. They are alachlor and its metabolite, alachlor ethame sulfonic acid, and atrazine and its class members, prometryn and propazine. A method for using cross reactivity for the detection of these compounds is explained in this paper. Additional information about the Organic Geochemistry Research Laboratory can be found at: http://ks.water.usgs.gov/studies/reslab/Thurman, E.M., and Aga, D.S., 2001, Detection of Pesticides and Pesticide Metabolites Using the Cross Reactivity of Enzyme Immunoassays: Journal of AOAC International, v. 84, no. 1, p. 163-167. To request a paper copy of this journal article, email: scribner@.usgs.gov |
U.S. Department of the Interior |
U.S. Geological Survey
URL: /pubs/abstracts/aoac.v8401.html
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The USGS has collected hydrologic information in Kansas since 1895 with the first USGS Cooperative
Water Program funding agreement for 6 streamflow gages with the Kansas Water Board. USGS collects streamflow
and gage-height data; reservoir content; water-quality and water-quantity data; suspended-sediment data;
and groundwater levels. Hydrologic studies are conducted on national, regional, statewide, and local levels.
The USGS in Kansas works cooperatively with 31 Federal, State, and local agencies, such as the Kansas Water Office, the U.S.Army Corps of Engineers, and the City of Wichita