Multiresidue method for determination of sulfonylurea herbicides in water by liquid chromatography with confirmation by capillary electrophoresis.
A liquid chromatographic method with comfirmation by capillary electrophoresis was used to determine 12 sulfonylurea herbicides in agricultural water. Analysis of 3 different water matrixes fortified at 2 levels gave good recoveries with adequate sensitivity at the 0.1 ppb level. A portion of the water was acidified with acetic acid and loaded onto an RP-102 solid-phase extraction (SPE) cartridge, and the extract was cleaned up on an alumina SPE cartridge. Extracts were desalted with an RP-102 SPE cartridge before instrumentation. Samples needing chemical filtration, such as pond water, required additional cleanup with a SAX SPE cartridge before the alumina cleanup step. Data were compiled for both determinative techniques and evaluated.
Hickes
H
H
Montana Department of Agriculture, Montana State University, Bozeman 59717, USA.
Watrous
M
M
D019342:Acetic Acid; D002853:Chromatography, Liquid / Q000379:methods*; D019075:Electrophoresis, Capillary; D006540:Herbicides / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D010573:Pesticide Residues / Q000032:analysis*; D012680:Sensitivity and Specificity; D013453:Sulfonylurea Compounds / Q000032:analysis*; D014867:Water / Q000737:chemistry*
D006540:Herbicides; D010573:Pesticide Residues; D013453:Sulfonylurea Compounds; D014867:Water; D019342:Acetic Acid