Abstract
The electroreduction of chloramphenicol has been studied by polarography, cyclic voltammetry, chronopotentiometry and coulometry. The experimental results lead to the conclusion that the drug undergoes a slow 2-electron reduction of the nitro group which is followed by a fast 2-electron reduction to hydroxylamine. At more negative potentials the hydroxylamine group is further reduced to the amine. In acetate buffer pH 4.7 with 0.003 % decylamine present, the drug produces a very well-defined, diffusion-controlled 4-electron polarographic wave. The current is proportional to the concentration and permits the drug to be determined by polarography in the concentration range 0.3–600 μg ml -1. A rapid polarographic method for the determination of chloramphenicol in milk is proposed.
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