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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA CHEMIA - Issue no. 3 / 2009 | |||||||
Article: |
POTASSIUM-SELECTIVE ELECTRODE BASED ON A CALIX[6]ARENIC ESTER (C6ES6). Authors: LIDIA VARVARI, SORIN-AUREL DORNEANU, IONEL CĂTĂLIN POPESCU. |
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Abstract: An ion-selective electrode (ISE) was elaborated based on a calyx[6]arenic ester (C6Es6) as ionophore and PVC as polymer matrix. Potentiometric measurements were performed in standard solutions of Ca2+, Mg2+, Na+, K+, NH4+ and Li+. The best response was observed for K+: slope 52 mV/DpK; linear range from 0.1 mM up to 0.1 M; detection limit of 0.02 mM; potentiometric selectivity coefficients of 0.06 and 0.16 for Na+ and NH4+, respectively. Keywords: calyx[6]arenic ester, PVC-based ISE, potassium ISE |
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