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Briefly, Discuss the instrumentation of polarography.
Accepted Answer
Polarography utilizes a dropping mercury electrode (DME) as the working electrode. This electrode is a capillary tube that delivers tiny mercury droplets at a constant rate, providing a fresh, clean electrode surface for each measurement. A reference electrode, typically a saturated calomel electrode (SCE), is used to provide a stable potential reference. The working and reference electrodes are immersed in the analyte solution, which is often stirred to ensure uniform concentration. A potentiostat applies a controlled voltage to the DME, and the resulting current is measured. The current-voltage relationship, known as a polarogram, is then analyzed to identify and quantify the analyte.
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