Abstract
A novel, simple, precise, accurate stability indicating liquid chromato-graphy method was developed for the separation and simultaneous quantification of bictegravir, emtricitabine, tenofovir in bulk drug and pharmaceutical formulations. Separation was achieved on ProntoSILHypersorb ODS C18 column using mobile phase of 0.1 M sodium perchlorate, methanol in the ratio of 65:35 (v/v), pH 4.8 at a flow rate of 1.0 mL/min and UV detection was monitored at a wavelength of 258 nm. In these conditions, well resolved peaks were observed with acceptable system suitability at a retention time of 4.6 min for bictegravir, 7.0 min for emtricitabine and 10.1 min for tenofovir. Very high correlated linearity range was found to be 5-30 μg/mL for bictegravir, 20-120 μg/mL for emtricitabine and 2.5-15 μg/mL for tenofovir. The method can separate and identify the unknown degradation compounds formed during stress degradation study.
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