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Journal of Analytical Methods in Chemistry
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Journal of Analytical Methods in Chemistry
/
2019
/
Article
/
Tab 4
/
Research Article
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 (
μ
g/L)
0.11
0.82
Repeatability (%)
2.53
2.71
Reproducibility (%)
3.92
4.19
Linearity
Range (
μ
g/L)
2–30
40–100
Slope (s·L/
μ
g)
0.058
0.037
Standard deviation of the slope (s·L/
μ
g)
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