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

Authors
Verschuren, PG van der Baan, JL Blaauw, R de Beer, D van den Heuvel, JC
Citation
Pg. Verschuren et al., A nitrate-selective microelectrode based on a lipophilic derivative of iodocobalt(III)salen, FRESEN J AN, 364(6), 1999, pp. 595-598
Citations number
23
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
ISSN journal
09370633 → ACNP
Volume
364
Issue
6
Year of publication
1999
Pages
595 - 598
Database
ISI
SICI code
0937-0633(199907)364:6<595:ANMBOA>2.0.ZU;2-Y
Abstract
The synthesis of iodo {2,2'-[1,2-octadecanediylbis(nitrilomethylidyne)]diph enolato} 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 sele ctivity coefficient of nitrate over nitrite and chloride amounts to -1.6 an d -2.7, respectively. The detection limit for nitrate in water amounts to 1 0(-5.2) mol/L. A nitrate profile measured in a nitrifying biofilm is presen ted as a practical application.