Table I.
Relative Permeabilities for Different Foreign Anions and Their Effect on the Parameters of the Popen Curves
| P X/P Cl | V 1/2 * at indicated percent chloride replacement | z | n ‡ | |||||
|---|---|---|---|---|---|---|---|---|
| mV | ||||||||
| Cl− | 1 | −88.2 ± 0.6 | 1.19 ± 0.03 | 23 | ||||
| Br− | 0.37 ± 0.01 | −90.5 ± 2.3 (100%) | 1.12 ± 0.09 | 3 | ||||
| NO3 − | 0.24 ± 0.02 | −117.5 ± 3.3 (50%) −117.0 ± 3.2 (100%) | 0.96 ± 0.11 0.62 ± 0.10 | 4 | ||||
| ClO3 − | 0.24 ± 0.02 | −109.4 ± 1.8 (50%) −114.6 ± 2.5 (100%) | 1.04 ± 0.05 0.58 ± 0.14 | 3 | ||||
| I− | 0.22 ± 0.02 | −117.1 ± 3.3 (10%) −150.3 ± 2.0 (50%) | 1.05 ± 0.05 0.57 ± 0.12 | 4 | ||||
| ClO4 − | anomalous mole-fraction effect 1.95 ± 0.15 (100% Cl− replacement) | −130.2 ± 2.0 (5%) | 1.06 ± 0.11 | 4 | ||||
| SCN− | anomalous mole-fraction effect 1.61 ± 0.18 (100% Cl− replacement) | −137.7 ± 1.0 (5%) −166.2 ± 1.6 (10%) | 1.05 ± 0.05 0.70 ± 0.10 | 5 | ||||
| HCO3 − | 0.027 ± 0.005 | −28.5 ± 3.0 (95%) | 0.97 ± 0.13 | 3 | ||||
| BrO3 − | 0.065 ± 0.006 | −41.3 ± 2.0 (95%) | 1.05 ± 0.07 | 3 | ||||
| Glutamate | 0.008 ± 0.003 | −16.0 ± 1.1 (95%) | 1.07 ± 0.04 | 6 | ||||
| Methanesulfonate | 0.007 ± 0.004 | −113.5 ± 3.5 (50%) −134.9 ± 2.0 (95%) | 0.94 ± 0.11 0.66 ± 0.04 | 3 | ||||
| Cyclamate | 0.008 ± 0.003 | −77.0 ± 2.0 (50%) −60.5 ± 1.5 (95%) | 1.07 ± 0.07 0.62 ± 0.07 | 4 |
*
Voltages have been corrected for liquid junction potentials (see methods).
‡
The same number of experiments was performed with a particular anion for each different percent chloride replacement.