Record Display for the EPA National Library Catalog

RECORD NUMBER: 305 OF 1201

OLS Field Name OLS Field Data
Main Title Determination of the Insect Growth Regulator Methoprene in Natural Waters by Capillary Gas-Liquid Chromatography.
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
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-103771 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
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.