Research Article

Sensitive Determination of Terazosin in Pharmaceutical Formulations and Biological Samples by Ionic-Liquid Microextraction Prior to Spectrofluorimetry

Figure 4

Influence of pH on the fluorescence intensities. Experimental conditions: terazosin concentration 75 μg L−1; [Hpy][PF6] 150 mg; NaPF6 350 mg. Inset: chemical structure of terazosin. Acid base equilibrium involved at working pH. (a) Protonated form of this terazosin; (b) dissociated form of terazosin.