Solid-phase extraction of carbofuran, atrazine, simazine, alachlor, and cyanazine from shallow well water.
Extraction of several nitrogen-containing pesticides from water on solid-phase C18 cartridges was rapid and accurate. One analyst can extract greater than 48 samples/day. Recovery efficiencies were 77, 95, 92, 90, and 99% with detection limits of 0.20, 0.05, 0.05, 0.20, and 0.10 micrograms/L for carbofuran, atrazine, simazine, alachlor, and, cyanazine, respectively. Extraction of the atrazine and simazine dealkylation products (deethylatrazine and deethylsimazine) was less efficient, e.g., 26 and 9%, respectively. Comparisons with 10 U.S. Geological Survey samples gave similar results.
Nash
R G
RG
U.S. Department of Agriculture, Agricultural Research Service, Natural Resources Institute, Beltsville, MD 20705.
D000081:Acetamides / Q000032:analysis; D001280:Atrazine / Q000032:analysis; D002235:Carbofuran / Q000032:analysis; D002849:Chromatography, Gas; D003640:Dealkylation; D007202:Indicators and Reagents; D010575:Pesticides / Q000032:analysis*; D012839:Simazine / Q000032:analysis; D014227:Triazines / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D000081:Acetamides; D007202:Indicators and Reagents; D010575:Pesticides; D014227:Triazines; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; C000188:alachlor; D001280:Atrazine; D012839:Simazine; D002235:Carbofuran; C007168:cyanazine