Krause RT, Wang Y. Oxidative detection of coulometrically reduced organonitro pesticides in reversed-phase high-performance liquid chromatography.
J Chromatogr A 1988;
459:151-62. [PMID:
3243894 DOI:
10.1016/s0021-9673(01)82023-9]
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Abstract
A high-performance liquid chromatographic system is presented for determination of organonitro pesticides, metabolites and industrial chemicals having a variety of chemical structures. The compounds are chromatographed on a C8 column with an acetonitrile-aqueous ammonium monochloroacetate gradient. The chromatographic responses of the compounds are monitored indirectly by oxidative detection of the coulometrically reduced organonitro functionality by means of a porousgraphite detector. Three nitrophenols (2,4-dinitrophenol, 4,6-dinitro-o-cresol and dinoseb), a dinitrophenyl aliphatic ester (binapacryl) and a nitroaniline (dicloran) were detected at low nanogram levels (3-10 ng for 50% recorder full-scale deflection). This technique overcomes the problems of high background currents and oxygen interference, observed in the direct reductive detection of organonitro compounds.
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