of kanamycin was developed on a thin-film mercury electrode (TFME). The optimal working conditions for the
application of the method were found to be pH 8.0, provided by a Britton-Robinson (B.R.) buffer, and an
adsorption potential of +0.30 V during 300 s. The equilibration time was applied during 10 s, and potential scans
were performed at a scan rate of 40 mV/s, with a square-wave frequency of 100 Hz. The measuring-system
response was linear over the kanamycin concentration range from 1.2
10
9 to 5.0 10
8 M and the detection limit achieved was 4.8
10
10 M. The relative error and relative standard deviation obtained were 1.20 and 4.67%, respectively. The voltammetric procedure was applied successfully to give a rapid and precise assay of
kanamycin in kanamycin sulfate injection form.