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A nitrate-selective microelectrode based on a lipophilic derivative of iodocobalt(III)salen

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Abstract

The synthesis of iodo{2,2′-[1,2-octadecanediylbis(nitrilomethylidyne)]diphenolato}cobalt is described. Liquid membrane microelectrodes based on this carrier exhibit Nernstian behaviour with a selectivity sequence according to the Hofmeister series: I– > NO3 – > NO2 – > Cl– > HCO3 – > AcO–. The selectivity coefficient of nitrate over nitrite and chloride amounts to –1.6 and –2.7, respectively. The detection limit for nitrate in water amounts to 10–5.2 mol/L. A nitrate profile measured in a nitrifying biofilm is presented as a practical application.

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Authors and Affiliations

  1. Instituut voor Technische Scheikunde, Universiteit van Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands, , , , , , NL

    P. G. Verschuren & Johannes C. van den Heuvel

  2. Scheikundig Laboratorium, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, , , , , , NL

    Juul L. van der Baan & Rolf Blaauw

  3. Max-Planck-Institut für Marine Microbiology, Celciusstraße 1, 28359 Bremen, Germany, , , , , , DE

    Dirk de Beer

Authors
  1. P. G. Verschuren
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  2. Juul L. van der Baan
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  3. Rolf Blaauw
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  4. Dirk de Beer
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  5. Johannes C. van den Heuvel
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Additional information

Received: 11 November 1998 / Revised: 22 January 1999 / Accepted: 27 January 1999

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Verschuren, P., van der Baan, J., Blaauw, R. et al. A nitrate-selective microelectrode based on a lipophilic derivative of iodocobalt(III)salen. Fresenius J Anal Chem 364, 595–598 (1999). https://doi.org/10.1007/s002160051392

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  • DOI: https://doi.org/10.1007/s002160051392

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