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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
  1. n = 5
  2. Sensor 1 (β-CD), Sensor 2 (γ-CD) and Sensor 3 (calaxirene)