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Table 1 Optimization of the PVC membrane composition

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

No. Plasticizer (350 mg) KTPB (mg) Sensor 1 Sensor 2 Sensor 3
Slope Range Slope Range Slope Range
1 DBS 5 50 1 × 10−3 to 1 × 10−5 45 1 × 10−3 to 1 × 10−5 47 1 × 10−3 to 1 × 10−5
2 DOP 5 59.5 1 × 10−3 to 8 × 10−6 51.5 1 × 10−3 to 8 × 10−6 56.5 1 × 10−3 to 8 × 10−6
3 o-NOPE 5 59.0 1 × 10−3 to 8 × 10−6 51.0 1 × 10−3 to 8 × 10−6 56.5 1 × 10−3 to 8 × 10−6
4 DOP 0 37 1 × 10−3 to 2 × 10−5 35 1 × 10−3 to 2 × 10−5 40 1 × 10−3 to 2 × 10−5
5 DOP 1 50 1 × 10−3 to 2 × 10−5 47 1 × 10−3 to 2 × 10−5 48 1 × 10−3 to 2 × 10−5
6 DOP 3 53 1 × 10−3 to 1 × 10−5 49 1 × 10−3 to 1 × 10−5 52.5 1 × 10−3 to 1 × 10−5
7 DOP 5 59 1 × 10−3 to 8 × 10−6 51.5 1 × 10−3 to 8 × 10−6 56.5 1 × 10−3 to 8 × 10−6
8 DOP 7 59 1 × 10−3 to 8 × 10−5 51.5 1 × 10−3 to 8 × 10−5 56.5 1 × 10−3 to 8 × 10−5
  1. Sensor 1 (β-CD), Sensor 2 (γ-CD) and Sensor 3 (calaxirene)