Potentiometric Determination of Ketotifen Fumarate in Pharmaceutical Preparations and Urine Using Carbon Paste and PVC Membrane Selective Electrodes

Figure 3

Effect of pH on (a) 10⁻² and (b) 10⁻⁴ mol L⁻¹ of KTF on the potential readings of CPE and PVC membrane electrodes.

(a)

(b)