Record Display for the EPA National Library Catalog
RECORD NUMBER: 45 OF 196| Main Title | Determination of the Insect Growth Regulator Methoprene in Natural Waters by Capillary Gas-Liquid Chromatography. | |||||||||||
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| Author | Knuth, M. L. ; | |||||||||||
| CORP Author | Environmental Research Lab.-Duluth, MN. | |||||||||||
| Publisher | c1989 | |||||||||||
| Year Published | 1989 | |||||||||||
| Report Number | EPA/600/J-89/085; | |||||||||||
| Stock Number | PB90-103771 | |||||||||||
| Additional Subjects | Insects ; Pesticides ; Growth regulators ; Determination ; Residues ; Gas chromatography ; Pest control ; Shallow water ; Watersheds ; Statistical analysis ; Reprints ; Methroprene ; Aquatic ecosystems ; Flame ionization | |||||||||||
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| Collation | 9p | |||||||||||
| Abstract | Residues of methoprene were measured in natural waters by capillary gas-liquid chromatography (GLC). 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 0.25 mm, DB-5 capillary column using a hydrogen flame ionization detector. The recovery of methoprene from natural waters was 107.6 plus or minus 20.2% (n=18). Methoprene was detected in 3 of 5 sites sampled and ranged from 0.39 to 8.8 micro g/L. |