Use of Alizarin Red S as an Ion-Pair Reagent for the Spectrophotometric Assay of Fexofenadine in Pharmaceuticals and in Spiked Human Urine

<table>Effect of alizarin red S concentration on the color development (6 <i>μ</i>g mL<sup>−1</sup> FFH).</table>

International Scholarly Research Notices

Figure 2: Use of Alizarin Red S as an Ion-Pair Reagent for the Spectrophotometric Assay of Fexofenadine in Pharmaceuticals and in Spiked Human Urine 