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 |
|