Fig. 2From: Simultaneous quantification of artesunate and mefloquine in fixed-dose combination tablets by multivariate calibration with middle infrared spectroscopy and partial least squares regressionExperimental central composite design (CCD) used for variation of active pharmaceutical ingredient contents, artesunate (ARS) and mefloquine (MFQ). Samples of calibration set are represented by circles and validation set by triangles Back to article page