28.  A Polyaniline-Skeleton Nickel Electrode for the Potentiometric Detection of Nitrate and Nitrite

Authors: N. Plesu, A. Kellenberger, N.Vaszilcsin


Abstract:

A modified electrode obtained by the electrochemical depositon of polyaniline from aqueous acid solutions on a rough substrate of skeleton nickel has been prepared and tested as potentiometric sensor. The detection properties of the skeleton Ni-polyaniline selective electrode were determined for nitrate and nitrite anions. The modified electrode presents short response time and Nernstian behaviour in the concentration range of 10-1 to 5⋅10-5 mol L-1. The selectivity coefficient for nitrate in the presence of nitrite was calculated according to the separate solution method.


Keywords: electrochemical sensor, polyaniline, skeleton electrodes, nitrate, nitrite

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