Electrochemical determination of oxytetracycline in veterinary drugs.

Conductometric, potentiometric and cyclic voltammetric (CV) titration methods are proposed for determination of oxytetracycline (OTC), commonly used in veterinary. The electrochemical titration of OTC hydrochloride with NH(4)Mo(7)O(24), NaVO(3), NaOH, AgNO(3) and FeCl(3) as titrants are reported. The proposed methods were found to be highly precise, having a relative standard deviation (R.S.D.) below 1.0%. Proposed electrochemical titrations were successfully applied to the assay of commercial preparations: Tetrox, Tetramutin OT and Neox, containing the above-mentioned antibiotics. The validity of the methods was tested by the recovery studies of standard addition to pharmaceuticals and results were found to be satisfactory.