Amperometriás baktériumelektród ammónium-ionkoncentráció mérésére

Translated title of the contribution: Amperometric bacterial electrode for the selective determination of ammonium ion concentration

Péter Hliva, Imre Kapui, G. Nagy, Lajos Czakó

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

An amperometric bacterial electrode is described for the selective determination of ammonium ion concentration in dilute aqueous solutions. The electrode is based on a platinum disc oxygen sensor. The ammonium ion function of the sensor is based on a bacterial layer coating the measuring surface of the oxygen electrode. This mixed strain biolayer contains Nitrosomonas and Nitrobacter bacteria and in the presence of oxygen it converts the ammonium ions to nitrate ions in two steps. The base sensing element follows the local decrease in the oxygen concentration resulted by the reaction. The bacterial sensor shows linear response to ammonium concentration in the range of 10-100 μM. The text discusses the analytically important parameters of the electrode. The dependence of the amperometric signal on the biolayer thickness was investigated in detail. Scanning electrochemical microscopy was found a valuable tool in studying the performance of the bacterial electrode.

Original languageHungarian
JournalMagyar Kemiai Folyoirat, Kemiai Kozlemenyek
Volume104
Issue number6
Publication statusPublished - Jun 1998

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Ammonium Compounds
Ions
Electrodes
Oxygen
Oxygen sensors
Sensors
Platinum
Nitrates
Bacteria
Microscopic examination
Scanning
Coatings

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Amperometriás baktériumelektród ammónium-ionkoncentráció mérésére. / Hliva, Péter; Kapui, Imre; Nagy, G.; Czakó, Lajos.

In: Magyar Kemiai Folyoirat, Kemiai Kozlemenyek, Vol. 104, No. 6, 06.1998.

Research output: Contribution to journalArticle

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