Environ. Sci. Techno/. 1995, 29,2759-2768
Hydroxylates Atrazine Degradation Products in a Small ROBERT N. LERCH,*,+ WILLIAM W. DONALD,+ YONG-XI LI,' AND EUGENE E. ALBERTSt USDA-Agricultural Research Service, Cropping Systems and Water Quality Research Unit, 269 Agricultural Engineering Building, University of Missouri, Columbia, Missouri 65211, and Analytical Bio-Chemistry Laboratories, Inc., 7200 East ABC Lane, Columbia, Missouri 65202
This research assessed the occurrence of hydroxylated atrazine degradation products (HADPs) in streamwater from Goodwater Creek watershed in the claypan soil region of northeastern Missouri. Streamwater was sampled weekly from June 1992 to December 1994 at a V-notch weir used to measure streamflow for this 7250-ha watershed. Filtered water samples were prepared by cation exchange solidphase extraction and analyzed for hydroxyatrazine (HA), deethylhydroxyatrazine (DEHA), and deisopropylhydroxyatrazine (DIHA) by high-performance liquid chromatography with UV detection. HADPs were confirmed by mass spectrometry and an alternative HPLCNV method. Frequency of HADP detection was 100% for HA, 25% for DEHA, and 6% for DIHA. Concentrations ranged from 0.18 to 5.7 p g L-l for HA, from
