Advances in Materials Science and Engineering / 2019 / Article / Tab 3 / Research Article
Simultaneous Determination of Zn(II), Cd(II), Pb(II), and Cu(II) Using Differential Pulse Anodic Stripping Voltammetry at a Bismuth Film-Modified Electrode Table 3 Analysis of variance (ANOVA) for BBD.
Terms Coefficient I pa,Cu Coefficient I pa,Pb Coefficient I pa ,Cd Coefficient I pa,Zn Constant 3.33 ≤0.001 3.34 ≤0.001 2.03 ≤0.001 1.53 ≤0.001 x 1 –0.27 ≤0.001 –0.25 ≤0.001 –0.16 ≤0.001 –0.14 ≤0.001 x 2 0.13 ≤0.001 0.15 ≤0.001 0.08 ≤0.001 0.07 ≤0.001 x 3 0.26 ≤0.001 0.25 ≤0.001 0.17 ≤0.001 0.15 ≤0.001 x 4 0.13 ≤0.001 0.11 ≤0.001 0.09 ≤0.001 0.06 ≤0.001 –0.53 ≤0.001 –0.51 ≤0.001 –0.33 ≤0.001 –0.30 ≤0.001 –0.41 ≤0.001 –0.42 ≤0.001 –0.24 ≤0.001 –0.24 ≤0.001 –0.26 ≤0.001 –0.24 ≤0.001 –0.16 ≤0.001 –0.15 ≤0.001 –0.40 ≤0.001 –0.40 ≤0.001 –0.26 ≤0.001 –0.22 ≤0.001 x 1 ·x 2 0.01 0.556 0.556 0.313 –0.03 0.005 0.03 ≤0.001 x 1 ·x 3 –0.02 0.270 0.270 0.056 –0.02 0.032 0.01 0.129 x 1 ·x 4 0.00 0.857 0.857 0.347 0.00 0.634 0.02 0.001 x 2 ·x 3 0.01 0.335 0.335 0.055 –0.03 0.005 –0.01 0.026 x 2 ·x 4 0.01 0.381 0.381 0.063 –0.03 0.017 –0.02 0.002 x 3 ·x 4 0.00 0.900 0.900 0.131 0.05 ≤0.001 0.02 ≤0.001 Lack-of-fit 0.654 0.541 0.086 0.132 Regression ≤0.001 ≤0.001 ≤0.001 ≤0.001
