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Table 6 Determination of methylphenidate using the proposed PVC membrane sensors

From: New potentiometric sensors for methylphenidate detection based on host–guest interaction

Added conc., μg/mL Sensors 1
2.69 26.9 269.7 2697.7
Measured 2.64 26.76 267.69 2695.1
R, % 98.14 99.47 99.25 99.90
SD 0.09 0.64 4.84 56.86
RSD, % 3.41 2.39 1.81 2.11
Sensor 2
Added Conc., μg/mL 2.69 26.9 269.7 2697.7
Measured 2.63 26.36 264.95 2663.9
R, % 97.76 97.99 98.23 98.72
SD 0.1 0.66 5.91 52.72
RSD, % 3.80 2.51 2.23 1.96
Sensor 3
Added conc., μg/mL 2.69 26.9 269.7 2697.7
Measured 2.64 26.36 265.17 2649.9
R, % 98.14 97.99 98.51 98.21
SD 0.1 0.64 5.89 50.1
RSD, % 3.78 2.43 2.22 1.89
  1. R %: recovery %, SD; standard deviation, RSD %: relative standard deviation %
  2. Sensor 1 (β-CD), Sensor 2 (γ-CD) and Sensor 3 (calaxirene)