Electrochemical detectors copper electrodes

Figure 17-7 Electrochemical detector measures sugars emerging from a chromatography column by using amperometry. Sugars are oxidized at the copper electrode, and water is reduced at the stainless steel exit arm. [Adapted from Bioanalytical Systems, West Lafayette, IN.]... 

Junqueira IRC, Araujo WR, Salles MO, Paixao TRLC (2013) Flow injection analysis of picric acid explosive using a copper electrode as electrochemical detector. Talanta 104 162-168... 

The ellipsometer used in this study is described elsewhere(3). It consists of a Xenon light source, a monochromator, a polarizer, a sample holder, a rotating analyzer and a photomultiplier detector (Figure 1). An electrochemical cell with two windows is mounted at the center. The windows, being 120° apart, provide a 60° angle of incidence for the ellipsometer. A copper substrate and a platinum electrode function as anode and cathode respectively. Both are connected to a DC power supply. The system is automated with a personal computer to collect all experimental data during the deposition. Data analysis is carried out by a Fortran program run on a personal computer. 

Electrochemical detection of carbohydrates at nickel-copper and nickel-chromium-iron alloy electrodes has been reported for sorbitol, and has been used as a detector for HPLC analysis [36]. Oxidation of various carbohydrates at the electrodes was used for detection, and baseline separation was achieved for mixtures of sorbitol, rhamnose, glucose, arabinose, and lactose. 

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