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Electroanalytical chemistry studies the analyte concentration by measuring the voltage and /or current in an electrochemical cell. The three main techniques in used are Potentiometry (measuring the voltage between two electrodes), Coulometry (measure the cell current vs. time and fixed potential)) and Potentiometry (measure the cell current with respect to a change in cell voltage. All Princeton Applied Research and Solartron Analytical potentiostats are suitable for this application. In addition, our systems can be coupled with third party electrodes such as the dropping mercury electrode for analyte concentration studies.