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dc.contributor.author | Ziyatdinova G. | |
dc.contributor.author | Morozov M. | |
dc.contributor.author | Budnikov H. | |
dc.date.accessioned | 2018-09-18T20:22:28Z | |
dc.date.available | 2018-09-18T20:22:28Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 1432-8488 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/139213 | |
dc.description.abstract | Multi-walled carbon nanotube modified graphite electrodes (MWNT-GEs) have been created for the voltammetric determination of α-tocopherol and retinol. The electrode surface was characterized by atomic force microscopy. The MWNT-GEs presented structured surfaces and a significant (26-fold) increase in roughness over unmodified graphite electrodes (8.2 vs. 0.32 nm for MWNT-GEs and GEs, respectively). Their surfaces consisted of aggregates with a highly regular "thorn-like" structure. α-Tocopherol and retinol were oxidized on the bare GEs and the MWNT-GEs in 0.1 M HClO 4 in acetonitrile. Decreases in the overpotential of 0.2 and 0.04 V for α-tocopherol and retinol, respectively, and increased oxidation currents were observed on the MWNT-GEs in comparison with the unmodified electrodes. The calibration graphs were linear in the range 0.065-2.00 mM for α-tocopherol and 0.05-1.50 mM for retinol. The detection limits were found to be 0.05 and 0.04 mM for α-tocopherol and retinol, respectively. The developed electrodes were applied to determine α-tocopherol and retinol in pharmaceuticals. The results obtained agreed well with coulometric titration data. © Springer-Verlag 2012. | |
dc.relation.ispartofseries | Journal of Solid State Electrochemistry | |
dc.subject | α-Tocopherol | |
dc.subject | Carbon nanotubes | |
dc.subject | Chemically modified electrodes | |
dc.subject | Pharmaceutical analysis | |
dc.subject | Retinol | |
dc.subject | Voltammetry | |
dc.title | MWNT-modified electrodes for voltammetric determination of lipophilic vitamins | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 7 | |
dc.relation.ispartofseries-volume | 16 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 2441 | |
dc.source.id | SCOPUS14328488-2012-16-7-SID84864556799 |