Abstract
A differential-pulse adsorptive stripping voltammetric method for the determination of trace amounts of the antibacterial trovafloxacin (TRFLX) is proposed. The optimal experimental parameters for the drug assay were: accumulation potential=−0.30 V (vs. Ag/AgCl), accumulation time=120 s, pulse amplitude=50 mV and scan rate=5 mV s −1 in Britton–Robinson buffer (pH 4.5). The linear concentration range of application was 2.0–20.0 ng ml −1 of TRFLX, with a relative standard deviation of 3.6% (for a level of 5.0 ng ml −1) and a detection limit of 0.6 ng ml −1. The method was applied to determination of TRFLX in human urine and serum samples. It was validated using HPLC as a reference method. Recovery levels of the method reached 100% in all cases
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