Spectrofluorimetric determination of tianeptine using its quenching effect on Vilazodone.

A rapid, cost effective, simple and reliable method was developed for the determination of Tianeptine (TIA) drug in bulk and in pharmaceutical formulation. The fluorescence of Vilazodone was measured in isopropanol at room temperature. The method was optimized by measuring the factors that may affect the fluorescence intensity such as: pH, diluting solvent, temperature and mixing time. The developed method was validated according to ICH guidelines in terms of accuracy, precision, linearity, range, LOD and LOQ. The concentration range was found to be linear in the range of 10-100 ng/ml. The LOD and LOQ values were found to be very small (1.86, 5.62 ng/mL. The % RSD and the % R were found within the acceptable range. Unlike the HPLC procedures, the proposed method for TIA determination has many advantages over the reported analytical methods represented in its rapidity, lower cost and environmental safety as the instrument is simple with low operating cost.