Table 1 The classification results of the LDA model for different concentrations of bases
OH− | CO32− | PO43− | NH3 | ClO− | DEA | TEA | |
|---|---|---|---|---|---|---|---|
1.0 mol L−1 | |||||||
Sensitivity | 1 | 0.67 | 0.67 | 0.67 | 1 | 1 | 1 |
Specificity | 1 | 0.94 | 1 | 1 | 1 | 1 | 0.89 |
Precision | 1 | 0.67 | 1 | 1 | 1 | 1 | 0.6 |
0.7 mol L−1 | |||||||
Sensitivity | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Specificity | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Precision | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
0.5 mol L−1 | |||||||
Sensitivity | 1 | 1 | 1 | 0.33 | 1 | 1 | 1 |
Specificity | 1 | 0.94 | 0.94 | 1 | 1 | 1 | 1 |
Precision | 1 | 0.75 | 0.75 | 1 | 1 | 1 | 1 |
0.3 mol L−1 | |||||||
Sensitivity | 0.67 | 0.67 | 1 | 1 | 1 | 1 | 1 |
Specificity | 1 | 1 | 1 | 1 | 1 | 0.89 | 1 |
Precision | 1 | 1 | 1 | 1 | 1 | 0.6 | 1 |
0.1 mol L−1 | |||||||
Sensitivity | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Specificity | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Precision | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
0.05 mol L−1 | |||||||
Sensitivity | 0.67 | 0 | 0 | 0.33 | 1 | 1 | 1 |
Specificity | 1 | 1 | 0.89 | 0.78 | 1 | 0.89 | 0.94 |
Precision | 1 | 0 | 0 | 0.2 | 1 | 0.6 | 0.75 |
0.01 mol L−1 | |||||||
Sensitivity | 1 | 1 | 1 | 0.67 | 1 | 1 | 1 |
Specificity | 1 | 1 | 1 | 1 | 1 | 1 | 0.94 |
Precision | 1 | 1 | 1 | 1 | 1 | 1 | 0.75 |
0.001 mol L−1 | |||||||
Sensitivity | 0.67 | 0 | 0.33 | 0.67 | 0.67 | 1 | 1 |
Specificity | 0.94 | 0.89 | 0.94 | 0.89 | 1 | 1 | 0.89 |
Precision | 0.67 | 0 | 0.5 | 0.5 | 1 | 1 | 0.6 |