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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
  1. Sensor 1 (β-CD), Sensor 2 (γ-CD) and Sensor 3 (calaxirene)
  2. SE standard error