Electrode Materials and Flow Cells

The most popular electrode materials are glassy carbon and porous graphite, since they have a large potential range (about — l.OV to +1.2V vs. Ag/ AgCl) with good chemical and mechanical resistance. 

Spending amperometric electrodes ( screen mode , Sect. 3.2), and the large electrodes are not contaminated as easily as the smaller disc electrodes. On the other hand, porous electrodes cannot be replaced. They are cleaned by flushing the cell with a nitric acid solution and organic solvents. One should also take care in connecting coulometric cells after spectroscopic detectors, as the backpressure resulting from porous electrodes may harm optical flow cells. 

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