Table 3 Analytical parameters of methylphenidate-PVC sensors
From: New potentiometric sensors for methylphenidate detection based on host–guest interaction
Parameter | Sensor 1 | Sensor 2 | Sensor 3 |
|---|---|---|---|
Slope, (mV/decade) | 59.4 ± 0.5 | 51.37 ± 0.5 | 56.5 ± 0.5 |
Intercept, mV | 220.45 ± 0.5 | 216.58 ± 0.5 | 248.17 ± 0.5 |
Calibration range | 8 × 10−6–1 × 10−3 | 8.0 × 10−6–1 × 10−3 | 8.0 × 10−6–1 × 10−3 |
STE YX | 0.816 | 2.85 | 0.816 |
SE slope | 0.5574 | 2.02 | 0.5574 |
SE Intercept | 2.357 | 8.25 | 2.357 |
Correlation coefficient, (r2) | 0.999 | 0.999 | 0.996 |
Lower limit of quantification (LOQ), M | 8 × 10−6 | 8 × 10−6 | 8 × 10−6 |
Lower limit of detection (LOD), M | 7.5 × 10−6 | 7 × 10−6 | 7 × 10−6 |
Response time for 1 × 10−3 M solution, (S) | 25 ± 0.5 | 25 ± 0.5 | 25 ± 0.5 |
Working pH range | 4–8 | 4–8 | 4–8 |