Overview
Standard potentials of reference electrodes
(potentials [mV] refer to standard hydrogen electrode)
| T in °C | silver chloride, Ag/AgCl, KCl | calomel, Hg/Hg2Cl2, KCl | |||||
| 1 mol/l | 3 mol/l | 3.5 mol/l | saturated | 0.1 mol/l | 1 mol/l | saturated | |
| 0 | 249.3 | 224.2 | 222.1 | 220.5 | 333.8 | 285.4 | 260.2 |
| 5 | 246.9 | 220.9 | 218.7 | 216.1 | 334.1 | 284.7 | 257.2 |
| 10 | 244.4 | 217.4 | 215.2 | 211.5 | 334.3 | 283.9 | 254.1 |
| 15 | 241.8 | 214.0 | 211.5 | 206.8 | 334.2 | 282.7 | 250.9 |
| 20 | 239.6 | 210.5 | 207.6 | 201.9 | 334.0 | 281.5 | 247.7 |
| 25 | 236.3 | 207.0 | 203.7 | 197.0 | 333.7 | 280.1 | 244.4 |
| 30 | 233.4 | 203.4 | 199.6 | 191.9 | 333.2 | 278.6 | 241.1 |
| 35 | 230.4 | 199.8 | 195.4 | 186.7 | 332.4 | 277.0 | 237.7 |
| 40 | 227.3 | 196.1 | 191.2 | 181.4 | 331.6 | 275.3 | 234.3 |
| 45 | 224.1 | 192.3 | 186.8 | 176.1 | 330.6 | 273.5 | 230.8 |
| 50 | 220.8 | 188.4 | 182.4 | 170.7 | 329.6 | 271.6 | 227.2 |
| 55 | 217.4 | 184.4 | 178.0 | 165.3 | 269.5 | 223.6 | |
| 60 | 213.9 | 180.3 | 173.5 | 159.8 | 267.3 | 219.9 | |
| 65 | 210.4 | 176.4 | 169.0 | 154.3 | 264.8 | 216.2 | |
| 70 | 206.9 | 172.1 | 164.5 | 148.8 | 262.2 | 212.4 | |
| 75 | 203.4 | 167.7 | 160.0 | 143.3 | |||
| 80 | 199.9 | 163.1 | 155.6 | 137.8 | |||
| 85 | 196.3 | 158.3 | 151.1 | 132.3 | |||
| 90 | 192.7 | 153.3 | 146.8 | 126.9 | |||
| 95 | 189.1 | 148.1 | 142.5 | 121.5 | |||