Table 4 Day to day reproducibility of methylphenidate using methylphenidate -PVC membrane sensors
From: New potentiometric sensors for methylphenidate detection based on host–guest interaction
Parameter | Methylphenidate (26.9 μg/mL) Within-day | Methylphenidate (26.9 μg/mL) Within-days | ||||
|---|---|---|---|---|---|---|
Sensor 1 | Sensor 2 | Sensor 3 | Sensor 1 | Sensor 2 | Sensor 3 | |
Found, μg/mL | 27.10 | 26.97 | 27.3 | 26.21 | 26.12 | 26.96 |
R, % | 100.74 | 100.26 | 101.48 | 97.43 | 97.1 | 100.23 |
SD | 0.65 | 0.59 | 0.63 | 0.65 | 0.59 | 0.63 |
RSD | 2.39 | 2.19 | 2.31 | 2.47 | 2.26 | 2.34 |