Indirect spectrophotometric determination of Emtricitabine

Indirect Spectrophotometric method for trace determination of Emtricitabine has been developed. The method is Base on decrease in absorbance of alkaline potassium permanganate in presence of Barium ion. The calibration Curve, Which is a plot of decreasing absorbance value of potassium permanganate solution at 540 nm against increasing concentration of Emtricitabine is linear up to 2.5 ppm.