Development of a Stability Indicating UPLC Method for the Determination of Tirbanibulin in Bulk and Its...

The primary goal of this study was to create and validate a simple, precise, sensitive, and accurate ultra-performance liquid chromatography (UPLC) method for estimating tirbanibulin in pure and dosage form.

A UPLC technique was developed using a Waters Acquity UPLC Phenyl (100 x 2.1 mm, 1.7 µm) column. The developed technique was validated in accordance with the International Conference on Harmonization (ICH) guidelines.

Tirbanibulin was separated chromatographically with high resolution using the mobile phase acetonitrile: buffer (30:70 v/v) at 0.5 mL/min, 5 µL injection volume, and 220 nm wavelength. The validated technique was found to be linear in the 1-15 µg/mL range. The detection and quantification limits for tirbanibulin were 0.03 and 0.1 µg/mL, respectively. The percentage relative standard deviation was less than 2%, demonstrating the precision of the developed technique. Furthermore, the recovery rate was nearly 100%, confirming the accuracy of the method. Minor modifications to the chromatographic conditions demonstrated the robustness of the method.

The developed analytical method was precise, simple, reproducible, and sensitive. Consequently, it can be used to determine tirbanibulin.