![]()
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
|
|||||||
Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului. |
|||||||
STUDIA CHEMIA - Ediţia nr.3 din 2009 | |||||||
Articol: |
COMPARATIVE STUDY OF CARBON PASTE ELECTRODES MODIFIED WITH METHYLENE BLUE AND METHYLENE GREEN ADSORBED ON ZEOLITE AS AMPEROMETRIC SENSORS FOR H2O2 DETECTION. Autori: DELIA GLIGOR, LEVENTE ABODI, LIANA MARIA MUREȘAN. |
||||||
Rezumat: Methylene Blue (MB) and Methylene Green (MG) adsorbed on a synthetic zeolite (13X) and incorporated in carbon paste resulted in modified electrodes (MB-13X-CPEs and MG-13X-CPEs) with electrocatalytic activity for H2O2 reduction. Using the treatment proposed by Laviron, the heterogeneous electron transfer rate constant (ks) was estimated, and values between 2.9 and 6.6 s-1 were found. The electrocatalytic ability of the modified electrodes towards H2O2 electroreduction depends mainly on the formal potential of mediator. The MB-13X-CPEs and MG-13X-CPEs respond to H2O2 in the linear range from ~10-4 to 10-1 M. The best performances were attained with MB-13X-CPEs in phosphate buffer (pH 6): detection limit 0.13 mM, at a signal to noise ratio equal to 3; sensitivity 0.94 mA/M, calculated as the ratio Imax/KM.
Keywords: carbon paste electrodes; Methylene Blue; Methylene Green; Zeolite; Hydrogen peroxide |
|||||||
![]() |
|||||||
![]() |