Table 2.
Characterization of a number of reported ion selective sensors based on nonconducting polymers for alkali cations.
| Cation | Ionophore | Slope (mV decade-1) | Linear Range (M) | Most Important Interfering ions (log Ksel> -2) | Ref. |
|---|---|---|---|---|---|
|
| |||||
| Li+-1 | lipophilic crown-4 derivatives | 58 | 10-4-10-1 | Na+, K+,NH4+ | 125 |
| Li+-2 | 1,10-Phenanthroline Derivatives | 58.7 | 10-4-10-1 | Na+, K+ | 128 |
|
| |||||
| Na+ | 1-methyl-1-vinyl-14-crown-5 | 55.0 | 3.16×10-6 -1.0×10-1 | K+ | 132 |
|
| |||||
| K+ | styrene/4(-vinyl-benzo-24-crown-8) copolymer | 58 | 1.0×10-6 -1.0×10-1 | - | 140 |
|
| |||||
| Rb+ | crown ethers incorporating anthraquinone, benzoquinone, and 1,4-dimethoxybezene | 54.7 | 1.0×10-5 -1.0×10-1 | Na+,K+,Mg2+,NH4+,Li+ | 145 |
|
| |||||
| Cs+ | calix[4]arene derivative [25-(3-bromo- proploxy)-5,11,-17,23-tetrakis(tert-butyl)-26,27,28-tris(1- propyloxy) calix[4]arene] | 58 | 1.0×10-6-1.0×10-1 | - | 153 |