Spectrofluorimetric approach for determination of citicoline in the presence of co-formulated piracetam through fluorescence quenching of eosin Y.

Abstract

A simple, sensitive, and precise spectrofluorimetric method has been developed and validated for quantitation of citicoline in its pharmaceutical formulations. The proposed method based on quantitative quenching effect of citicoline on the native fluorescence of Eosin Y via developing of a binary complex reaction between the cited drug and Eosin Y in acidic medium using acetate buffer pH=3.6. The quenching of the fluorescence of eosin was measured at 540nm after excitation at 518nm. Calibration graph was achieved in the range of 300-3000ng/mL with 0.9996 as correlation coefficient and 291.0 and 93.86ng/mL as quantitation and detection limits, respectively. The developed method considered as the first developed spectrofluorimetric one for quantitation of citicoline with high sensitivity and validated according to ICH guidelines. The selectivity of the proposed method was investigated by studying the interference of piracetam as co-formulated drug with CIT in pharmaceutical formulation, therefore the developed method could be used for routine quality control of citicoline in its pharmaceutical formulations either alone or in combination with piracetam.