Development and Validation of a Simple, Green Infrared Spectroscopic Method for Quantitation of Sildenafil Citrate in Siloflam Tablets of Unknown Manufacturing Formula

Figure 2

Selection of factor number for calibration model: (a) variation of correlation coefficient and (b) variation of the difference between RMSEC and RMSEV and variation of relative error due to linear regression at R value of about 50%).

(a)

(b)