Abstract
A differential-pulse polarographic (DPP) method was developed for the determination of brodimoprim (BDP) in Michaelis (MCL) buffer. The peak potential (Ep) occurs at –1.33 V (versus SCE) when the pH of the system is 4.0. The voltammetric behaviour in MCL buffer and the mechanisms of the electrode reaction were studied by, e.g., linear sweep voltammetry, cyclic voltammetry and normal-pulse polarography. The wave was confirmed to be an irreversible adsorptive wave. The relationship between peak height and concentration of BDP was linear in the range 5.0 × 10–8–1.0 × 10–7 mol l–1 with a detection limit of 1.0 × 10–9 mol l–1, when the adsorptive accumulation time was 5 min.
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