Stereoselective analysis of acid herbicides in natural waters by capillary electrophoresis.
A capillary electrophoretic method for the stereoselective analysis of aryloxypropionic and aryloxyphenoxypropionic acidic herbicides in ground water and river water was performed. Vancomycin and gamma-cyclodextrin were added to the background electrolyte (BGE) as chiral selectors. Water sample preconcentration was accomplished by solid-phase extraction on styrene-divinylbenzene packed cartridges (2 L of ground water and 1 L of river water). The analytical method allowed for the resolution of mecoprop, fenoprop, fluazifop and haloxyfop racemic mixtures in natural water samples spiked with enantiomer concentration levels in the range 0.1-0.13 ppb for ground water and 0.4-0.54 ppb for river water.
Polcaro
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CM
Istituto di Cromatografia, CNR, Area della Ricerca di Roma Monterotondo Scalo, Rome, Italy. cpolcaro@nserv.icmat.mlib.cnr.it
Marra
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C
Desiderio
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Fanali
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D015085:2,4,5-Trichlorophenoxyacetic Acid / Q000031:analogs & derivatives / Q000032:analysis; D008456:2-Methyl-4-chlorophenoxyacetic Acid / Q000031:analogs & derivatives / Q000032:analysis; D004095:Dihydropyridines / Q000032:analysis; D019075:Electrophoresis, Capillary / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D011422:Propionates / Q000032:analysis*; D011725:Pyridines / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
D004095:Dihydropyridines; D006540:Herbicides; D011422:Propionates; D011725:Pyridines; D014874:Water Pollutants, Chemical; C054176:haloxyfop; C008340:mecoprop; C050582:fluazifop; D015085:2,4,5-Trichlorophenoxyacetic Acid; C009264:fenoprop; D008456:2-Methyl-4-chlorophenoxyacetic Acid