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
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.
Authors: ION ALEXANDRU PUPĂZAN, DELIA MARIA GLIGOR.
This work describes a simple and reliable method for electro¬chemical determination of nitrite based on carbon paste electrodes modified with diatomite adsorbed with Toluidine Blue (CPE-D-TBO). The electrochemical behavior was investigated using cyclic voltammetry measurements in different experimental conditions (cycling times, scan rates, pH values of supporting electrolyte). The electrochemical parameters of modified electrodes were determined (E0’, -198 mV vs. Ag|AgCl/KClsat; ∆Ep, 79 mV vs. Ag|AgCl/KClsat and |Ipa/Ipc| = 1.81). The modified electrodes CPE-D-AT showed good electro¬chemical stability. Analytical parameters of the obtained sensors determined using amperometric measurements confirm their possibility to use in real samples (detection limit, 9.10 µM; sensitivity, 9.88 mA M-1; linear domain, 0.0001-0.1 mM).
Key words: amperometric sensors, electrodes, diatomite
