A nitrate ion selective electrode

using glassy carbon electrode as a carrier and polypyrrole film containing nitrate ion as a sensitive film is studied based on nitrate doped polypyrrole technology.The response of the electrode potential shows good linear relationship in the sodium nitrate solution containing nitrate concentration on the order of 10-4.5

10-4.0

10-3.5

10-3.0

10-2.5

10-2.0mol/L.The potential slope value is closed to the theoretical value and meets Nernst law.The electrode is simple to use

with short response time and good repeatability.It has provided an effective proposal to the real-time monitoring of total nitrogen.