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ENVIRONMENTAL IMMUNOCHEMISTRY
Citation:
Van Emon, J M. ENVIRONMENTAL IMMUNOCHEMISTRY. Presented at American Chemical Society Meeting, New Orleans, LA, August 22-26, 1999.
Description:
Environmental immunochemical methods are responding to the changing needs of regulatory and monitoring programs and are meeting new analytical challenges as they arise. Immunoassays are being developed for screening multiple organophosphorous (OP) pesticides (0,0-diethyl thionates/thionothiolates) in agricultural and home environments. Methods for soil and food analysis are being optimized for nonoccupational exposure studies. An ELISA to detect chlorpyrifos in track-in dirt and house dust is being applied to real-world samples. Samples are sonicated with 5% methanol in a phosphate buffer. A detection level of <10 ng/niL can be achieved. A similar approach was used to detect polychlorinated biphenyls (PCBs) in soil. Samples were analyzed for PCBs by both GC/ECD and ELISA methods. A correlation coefficient of 0.91 was obtained for 41 soil samples. Chemically modified electrodes are being evaluated for on-line monitoring of PCBs and OPs.