Table 1.
Experimental design showing the studied factors and monitored responses for each sensor.
| Run | Factors | Responses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| A | B | C | Slope (mV/decade) | r | pLOQ (M) | Response time (sec) | |||
| 1 | TPB (+) | BCD (+) | DBP (−) | 29.49 | 0.996 | 5.97 | 1.50 × 10–5 | 8.27 × 10–4 | 7 |
| 2 | TPB (+) | BCD (+) | NPOE (+) | 22.51 | 0.984 | 5.97 | 6.08 × 10–5 | 1.01 × 10–4 | 12 |
| 3 | PT (−) | CX8 (−) | NPOE (+) | 23.53 | 0.998 | 5.97 | 3.13 × 10–5 | 3.85 × 10–4 | 6 |
| 4 | TPB (+) | CX8 (−) | DBP (−) | 23.53 | 0.999 | 5.97 | 6.28 × 10–4 | 1.86 × 10–3 | 8 |
| 5 | PT (−) | CX8 (−) | DBP (−) | 33.14 | 0.988 | 5.97 | 6.39 × 10–5 | 1.90 × 10–3 | 5 |
| 6 | PT (−) | BCD (+) | NPOE (+) | 23.92 | 0.999 | 5.97 | 2.80 × 10–4 | 9.46 × 10–4 | 5 |
| 7 | PT (−) | CX8 (−) | DBP (−) | 35.32 | 0.977 | 5.97 | 9.39 × 10–5 | 8.59 × 10–4 | 6 |
| 8 | TPB (+) | CX8 (−) | DBP (−) | 23.52 | 0.997 | 5.97 | 2.68 × 10–4 | 2.01 × 10–3 | 6 |
| 9 | PT (−) | BCD (+) | NPOE (+) | 24.47 | 0.998 | 5.97 | 3.69 × 10–4 | 3.08 × 10–4 | 6 |
| 10 | TPB (+) | BCD (+) | DBP (−) | 30.87 | 0.989 | 5.97 | 1.19 × 10–5 | 8.30 × 10–4 | 6 |
| 11 | TPB (+) | BCD (+) | NPOE (+) | 24.43 | 0.995 | 5.97 | 8.15 × 10–5 | 3.50 × 10–4 | 10 |
| 12 | PT (−) | CX8 (−) | NPOE (+) | 22.65 | 0.997 | 5.97 | 1.14 × 10–5 | 4.60 × 10–4 | 5 |
| 13 | PT (−) | BCD (+) | DBP (−) | 32.13 | 0.997 | 5.97 | 6.23 × 10–4 | 1.72 × 10–4 | 6 |
| 14 | TPB (+) | CX8 (−) | NPOE (+) | 28.65 | 0.995 | 5.97 | 7.10 × 10–4 | 1.18 × 10–4 | 8 |
| 15 | TPB (+) | CX8 (−) | NPOE (+) | 29.77 | 0.993 | 5.97 | 1.45 × 10–4 | 6.88 × 10–4 | 10 |
| 16 | PT (−) | BCD (+) | DBP (−) | 30.33 | 0.995 | 5.97 | 9.26 × 10–4 | 3.65 × 10–4 | 7 |
A: Ion-exchanger, B: Ionophore, C: Plasticizer, r:correlation coefficient, pLOQ = -log the quantification limit, : selectivity coefficients for 4,7-dichloroquinoline, : selectivity coefficients for hydroxynovaldiamine.