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The respective area and percentage of free ions and contact ions of each sample.
| Sample | Coefficient of Determination, COD (R2) | Residual Sum of Square (× 10−2) (a.u.) | Free Ion | Contact Ion | ||
|---|---|---|---|---|---|---|
| Area (a.u.) | (%) | Area (a.u.) | (%) | |||
| AC1 | 0.99 | 1.16 | 126.07 | 85.48 | 21.42 | 14.52 |
| AC3 | 0.99 | 1.74 | 79.73 | 73.52 | 28.71 | 26.48 |
| AC5 | 0.99 | 6.14 | 69.66 | 75.37 | 22.77 | 24.63 |
| AC7 | 0.99 | 2.67 | 36.97 | 59.53 | 25.12 | 40.47 |
| AC9 | 0.99 | 1.70 | 152.35 | 77.81 | 43.46 | 22.19 |
| AC11 | 0.99 | 0.46 | 128.31 | 68.51 | 58.97 | 31.49 |
