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 4

The analytical characteristics of the proposed methods.

Parameter	Value
	Cd	Pb
Limit of quantitation (μg/L)	0.11	0.82
Repeatability (%)	2.53	2.71
Reproducibility (%)	3.92	4.19
Linearity
Range (μg/L)	2–30	40–100
Slope (s·L/μg)	0.058	0.037
Standard deviation of the slope (s·L/μg)	0.002	0.002
Intercept (s)	0.07	0.09
Standard deviation of the intercept (s)	0.003	0.002
Correlation coefficient	0.996	0.991