IPVC ISPE
Concentration range (mol L-1) Content (mg) Slope (mV decade-1) R Content (mg) Slope (mV decade-1) R
  NaTPB     NaTPB    
1.0x10-6– 1.0x10-2 5 47.0 ± 2.1 0.999 5 35.0±0.9 0.999
1.0x10-6– 1.0x10-2 7.5 57.2 ± 2.6 0.999 7.5 38.2 ± 1.8 0.999
1.0x10-6– 1.0x10-2 10 53.2 ± 1.8 0.999 10 48.0 ± 2.3 0.999
1.0x10-6– 1.0x10-2 12.5 49.0 ± 2.5 0.999 12.5 50.0 ± 3.1 0.998
1.0x10-6– 1.0x10-2 15 42.0 ± 1.7 0.999 16 54.3 ± 3.0 0.999
1.0x10-6– 1.0x10-2 20 40.0 ± 1.3 0.999 22 58.6 ± 1.7 0.999
1.0x10-6– 1.0x10-2 25 37.0 ± 1.8 0.999 30 52.1 ± 3.6 0.999
  PMA     RN    
1.0x10-6– 1.0x10-2 5 51.0 ± 2.8 0.999 6 34.3 ± 1.6 0.999
1.0x10-6– 1.0x10-2 7.5 59.2 ± 4.6 0.996 12 42.7 ± 2.7 0.998
1.0x10-6– 1.0x10-2 10 54.7 ± 2.8 0.999 16 60.0 ± 2.0 0.999
1.0x10-6– 1.0x10-2 12.5 53.0 ± 0.2 0.999 22 49.0 ± 2.0 0.999
1.0x10-6– 1.0x10-2 15 50.0 ± 2.8 0.999 30 45.0 ± 3.1 0.998
1.0x10-6– 1.0x10-2   20 49.0 ± 2.3 0.999      
1.0x10-6– 1.0x10-2 25 52.0 ± 1.7 0.999      
1.0x10-6– 1.0x10-2 PTA 51.6 ± 2.0 0.999 PTA 22.1 ± 0.9 0.999
5       6
1.0x10-6– 1.0x10-2 7.5 57.7 ± 2.7 0.999 12 40.4 ± 1.7 0.999
1.0x10-6– 1.0x10-2 10 53.0 ± 1.8 0.999 16 46.0 ± 1.8 0.999
1.0x10-6– 1.0x10-2 12.5 49.0 ± 2.6 0.999 22 52.8 ± 2.7 0.999
1.0x10-6– 1.0x10-2 15 45.0 ± 2.5 0.999 30 59.0 ± 3.3 0.999
1.0x10-6– 1.0x10-2 20 43.1 ± 1.7 0.999 35 52.7 ± 1.6 0.999
1.0x10-6– 1.0x10-2 25 40.0 ± 2.0 0.999      
Table 2: Effect of ion pairing agent type on the performance of IPVC and ISPE electrodes.