Design and evaluation of an electrochemical sensor for determination of dissolved oxygen in water.

A voltammetric cell with a graphite-paste cathode and silver-wire anode was designed for dissolved oxygen determinations in water. Its most important features were evaluated in laboratory and field studies. Several advantages such as higher sensitivity, wider linear response interval, negligible interference due to carbon dioxide, and shorter response time, besides its low cost and simple construction, were found when it was compared with sensors having a platinum cathode.