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Table 4 Potentiometric selectivity coefficients of the optimized sensor for different interfering ions calculated using the separate solution method (59)

From: Experimentally designed electrochemical sensor for therapeutic drug monitoring of Ondansetron co-administered with chemotherapeutic drugs

Interfering compound

\({K}_{OND, Int}^{pot}\)*

Potassium

4.33 × 10−3

Sodium

1.09 × 10−3

Ammonium

3.07 × 10−3

Calcium

2.73 × 10−4

Magnesium

5.30 × 10−5

Cadmium

1.20 × 10−4

ferrous

1.08 × 10−4

chromium

2.70 × 10−4

  1. *Average of three determinations