Electrochemical gas sensor for detecting analyte, has mediator that is dissolved in saturated form in electrolytes and is available as precipitate in electrolyte space, and protection electrode arranged at rear of measuring electrode

摘要

The sensor has a measuring electrode (3) made of carbonaceous material such as graphite, adamantine carbon, carbon nano tubes or boron doped diamond, and an analyte selective mediator that is dissolved in a saturated form in electrolytes (9) and is available as precipitate (10) in electrolyte space. A protection electrode (5) is arranged at the rear of the measuring electrode. A mediator-compound is a transition metal salt of an acid-compound such as aromatic carboxylic acid e.g. phthalic acid and terephthalic acid, citric acid and boric acid.