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DETERMINATION OF THE INSECT GROWTH REGULATOR METHOPRENE IN NATURAL WATERS BY CAPILLARY GAS-LIQUID CHROMATOGRAPHY
Citation:
Knuth, M. DETERMINATION OF THE INSECT GROWTH REGULATOR METHOPRENE IN NATURAL WATERS BY CAPILLARY GAS-LIQUID CHROMATOGRAPHY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/085 (NTIS PB90103771), 1989.
Description:
Residues of methoprene were measured in natural waters by capillary as liquid chromatography (GLG). Methoprene was extracted in the field by liquid-liquid partitioning with dichloromethane, transPorted to the laboratory, and extracted a second time with hexane. The extracts were dried with Na2SO4 and analyzed by Capillary GLC on a 15m x 0.25mm. DB-5 capillary column using a hydrogen flame ionization detector. The recovery of methoprene from natural waters was 107.6 + 20.2% (n=l8). Methoprene was detected in 3 of 5 sites sampled and ranged from 0.39 to 8.8 ug/L.