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| Figure 5: Representative HPLC-UV chromatograms of 2 μg/mL SUL; at 225 nm (a): in bulk form and (b): in pharmaceutical formulation using acetonitril: methanol: water: pH 9 B-R universal buffer in the proportion of (20: 20: 40: 20, v/v/v/v) as a mobile phase. Inset : Plot of peak area (A) vs. concentration (C) of bulk SUL. |
