Potentiometric Stripping Analysis of Cadmium and Lead with Constant Inverse Current in the Analytical Step Using an Open Tubular Mercury-Coated Glassy Carbon Electrode

Table 2

Interference study for cadmium and lead determination.

Metal	Interfering ion^a	Change of signal (%)
Cd	Tl^+	+2.20
	In^3+	−3.95
Pb	Sn^2+	+2.47

^aThe mass ratio of interfering ions to analyte was 30 : 1.