Summary
Data are given for checking the condition of redox electrodes. Their potentials can be calibrated either with ready-to-use METROHM Standard Redox Solution, or by measurement in buffer solutions saturated with quinhydrone followed by comparison with calculated values. Redox potential is the potential appearing on a precious-metal electrode immersed in a reduction-oxidation (redox) system. When the electrode responds properly, calibration is unnecessary. However, contaminated precious-metal electrodes can give false potential indications, and the reference-electrode potential may also be erroneous. For these reasons it is often desirable to check the potentials of redox electrode-assemblies, for which purpose solutions with a definite redox potential are required.
[PDF] Checking the condition of platinum and gold electrodes
Data are given for checking the condition of redox electrodes. Their potentials can be calibrated either with ready-to-use METROHM Standard Redox Solution, or by measurement in buffer solutions saturated with quinhydrone followed by comparison with calculated values. Redox potential is the potential appearing on a precious-metal electrode immersed in a reduction-oxidation (redox) system. When the electrode responds properly, calibration is unnecessary. However, contaminated precious-metal electrodes can give false potential indications, and the reference-electrode potential may also be erroneous. For these reasons it is often desirable to check the potentials of redox electrode-assemblies, for which purpose solutions with a definite redox potential are required.
[PDF] Checking the condition of platinum and gold electrodes
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