Figure 3. Contour plots of (A) retention time vs. OPA concentration and flow rate, (B) retention time vs. wavelength and OPA concentration, (C) USP tailing factor vs. OPA concentration and flow rate, and (D) USP tailing factor vs. OPA concentration and wavelength

From

Design of Experiment Assisted UV-Visible Spectrophotometric and RP-HPLC Method Development for Ambrisentan Estimation in Bulk and Formulations

Shanta K. Adiki, Prashanti M, Baishakhi Dey, Prakash Katakam, Fathi H. Assaleh, Nagiat T. Hwisa, Rajeev K. Singla, Babu R. Chandu

World Journal of Analytical Chemistry. 2014, 2(2), 23-30 doi:10.12691/wjac-2-2-2