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. 2020 Jul 18;20(14):4006. doi: 10.3390/s20144006

Table 1.

Analysis and fitting parameters of the dose response for each analyte.

Analyte Peak Potential a Response b MSE c Fitting Parameters Baseline d LOD e
a b x0
BPA Epa = 0.540 Hyperbolic 74.6 6.9 × 10−3 7.2 × 10−4 0.99 120
CdCl2 Epa = −0.756 Sigmoidal 27.5 36 240 820 1.96 320
CuSO4 Epa = −0.228 Hyperbolic 126.2 4.4 × 10−3 2.8 × 10−4 1.15 140
DQBr2 Epc = −0.536 Hyperbolic 90.3 −0.079 3 × 10−3 −4.41 130
HgCl2 Epa = 0.108 Linear 38.1 0.0115 0.117 1.39 340
MeP Epa = 0.052 Hyperbolic 24.9 3.0 × 10−4 4.2 × 10−4 1.06 380
PbCl2 Epa = −0.568 Sigmoidal 152.7 4.2 170 740 1.37 350
PQCl2 Epc= −0.536 Hyperbolic 38.6 −0.18 6.3 × 10−3 −4.80 70

a Peak potential vs. Ag/AgCl used for the dose response of analyte; Epa = anodic peak potential, Epc = cathodic peak potential; b Sigmoidal = Equation(1) and Hyperbolic = Equation (2); c Mean Standard Error; d Baseline is the average value of current at the peak potential used at zero concentration in μA. e The limit of detection (LOD) in ppb is estimated using the equation LOD = 3 s/m, where s is the standard deviation of the lowest measureable signal and m is the corresponding slope.

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