Potentiometric method and double indicator electrode amperometric titration method

Potentiometric method is an analytical method that uses the electromotive force of a primary battery to determine the content of the analyte. It is divided into direct potentiometric method and potentiometric titration method. The electrode consists of a reference electrode and an indicator electrode inserted into the test solution. Commonly used reference electrodes are saturated calomel electrodes (SCE) or silver-silver chloride electrodes. There are four types of indicating electrodes: metal-metal ion electrodes (type 1 electrodes), metal-metal refractory electrodes (type 2 electrodes), non-metal electrodes (type zero electrodes) and ion selective electrodes (membrane electrodes).

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