The selectivity of the two proposed sensors towards pioglitazone^a.

Interferentb	Selectivity coefficient (mean ± S.D.)
	LC-ISE		SC-SP-ISE
Mannitol	1.41 × 10−3	±0.65	8.32 × 10−4	±0.11
Cellulose	5.91 × 10−3	±0.78	6.98 × 10−4	±1.09
Magnesium stearate	7.91 × 10−3	±1.23	11.07 × 10−3	±0.56
Talc	6.81 × 10−3	±0.34	1.82 × 10−3	±0.88
Lactose	5.14 × 10−3	±0.44	3.83 × 10−4	±1.23
Ferric oxide	2.94 × 10−3	±0.89	2.81 × 10−3	±0.76
Starch	10.37 × 10−3	±1.20	9.93 × 10−3	±0.58
Ca2+	11.07 × 10−3	±1.32	8.18 × 10−3	±0.90
Mg2+	9.24 × 10−4	±0.77	5.19 × 10−4	±1.11
Alogliptin benzoate	8.86 × 10−3	±0.56	7.67 × 10−4	±0.67

^aEach value is the average of three determinations.

^bAll interferents are in the form of 1 × 10⁻³ mol L⁻¹ solution.