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Table 1 Optimization of the membrane composition to fabricate high iron (III) selective electrode

From: Potentiometric sensor for iron (III) quantitative determination: experimental and computational approaches

Sensor no.

I

PVC

Plasticizer

Lipophilic additive

Nernstian slope (mV decade−1)a

R2

Response time (s)

DOP

DBP

o-NPOE

NB

KTpClPB

NaTFPB

TDATpClPB

NaTPB

1

0

30.0

 

69.5

0.5

4.68 ± 0.21

0.866

N/A

2

3.0

30.0

66.5

0.5

16.51 ± 0.25

0.998

17

3

4.0

30.0

65.5

0.5

19.51 ± 0.10

0.998

12

4

5.0

30.0

64.5

0.5

24.23 ± 0.36

0.996

10

5

4.0

30.0

65.5

0.5

18.14 ± 0.41

0.940

13

6

4.0

30.0

65.5

0.5

12.30 ± 0.48

0.933

17

7

4.0

30.0

65.5

0.5

17.77 ± 0.35

0.970

15

8

4.0

30.0

65.5

0.5

14.40 ± 0.54

0.987

15

9

4.0

30.0

65.5

0.5

17.40 ± 0.45

0.992

14

10

4.0

30.0

65.5

0.5

11.62 ± 0.39

0.973

17

11

4.0

30.0

65.8

0.2

18.34 ± 0.26

0.998

15

12

4.0

30.0

65.0

1

22.17 ± 0.33

0.975

15

13

4.0

30.0

64.5

1.5

24.37 ± 0.43

0.975

13

  1. aAverage and standard deviation for triplet measurements