Reverse-phase liquid chromatographic behavior of some carbamate and urea pesticides

Microarray electrochemical flow detectors at high applied potentials and liquid chromatography with electrochemical detection of carbamate pesticides in river water

“…By contrast, subnanogram gas chromatographic (GC) detection is feasible only after extensive sample cleanup, preconcentration, and derivatization (18)(19)(20). The detection limits obtained here are superior to those obtained by other competitive methods for direct determination of carbamate pesticides without preconcentration, including direct injection gas chromatography (GC) (>10 ng) (20,21), LC with direct optimized variable-wavelength UV detection (1-10 ng) (20,(22)(23)(24)(25), fluorescence detection after derivatization (typically 1-10 ng (26)(27)(28), 0.5 ng in one case (29), and electrochemical detection with glassy carbon electrodes (typically 1-10 ng) (7,8). Detection limits range from several-fold to as much as 60-fold better than reported previously for the same compounds using other electrode materials (7,8).…”

Determination of Aldicarb Residues in Tobacco/Bestimmung von Aldicarb-Rückständen in Tabak

“…(11). Wegen der zu geringen Absorption von Aldicarb im liingerwelligen UV-Bereich fand die Hochdruck-Fliissigkeitschromatographie (HPLC) bisher nur vereinzelt Anwendung bei der Bestimmung von Aldicarb und seinen Metaboliten (12)(13)(14).…”

Pesticide residues

“…Telling and co-workers (446) determined organochlorine insecticide residues in fatty food stuffs using a clean-up technique based on a single column of activated alumina. Cleanup was based on the use of a single 22-g column of activity-4 alumina and the method was routinely capable of determining cyclodienes, BHC isomers, and HCB at the 5-10 Mg/kg level and DDT-type compounds at [20][21][22][23][24][25][26][27][28][29][30] Mg/kg level.…”

“…Aten and Bourke (23) described the reverse-phase liquid chromatographic behavior of some carbamate and urea pesticides.…”