Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode
In this paper, multi-walled carbon nanotube/Azure A/gold nanoparticle composites (Nafion/AuNPs/AzA/MWCNTs) were prepared by binding gold nanoparticles to the surfaces of Azure A-coated carbon nanotubes. Nafion/AuNPs/AzA/MWCNTs based electrochemical sensor was fabricated for the simultaneous determin...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2016-05-01
|
| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535215000337 |
| _version_ | 1818922754199519232 |
|---|---|
| author | Hayati Filik Asiye Aslıhan Avan Sevda Aydar |
| author_facet | Hayati Filik Asiye Aslıhan Avan Sevda Aydar |
| author_sort | Hayati Filik |
| collection | DOAJ |
| description | In this paper, multi-walled carbon nanotube/Azure A/gold nanoparticle composites (Nafion/AuNPs/AzA/MWCNTs) were prepared by binding gold nanoparticles to the surfaces of Azure A-coated carbon nanotubes. Nafion/AuNPs/AzA/MWCNTs based electrochemical sensor was fabricated for the simultaneous determination of ascorbic acid, dopamine, uric acid, and tryptophan. Cyclic voltammetry and electrochemical impedance spectroscopy were used to characterize the electrochemical properties of the modified electrodes. The modified electrode showed excellent electrocatalytic activity toward ascorbic acid, dopamine, uric acid, and tryptophan (pH 7.0). The experiment results showed that the linear response range for simultaneous detection of AA, DA, UA and Trp were 300–10,000 μM, 0.5–50 μM, 0.5–50 μM and 1.0–100 μM, respectively, and the detection limits were 16 μM, 0.014 μM, 0.028 μM and 0.56 μM (S/N = 3). The proposed method offers promise for simple, rapid, selective and cost-effective analysis of small biomolecules. The procedure was also applied to the determination of tryptophan in spiked milk samples. |
| first_indexed | 2024-12-20T01:58:34Z |
| format | Article |
| id | doaj.art-35664b8ca1ff45d5af243c80e0407752 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-20T01:58:34Z |
| publishDate | 2016-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-35664b8ca1ff45d5af243c80e04077522022-12-21T19:57:24ZengElsevierArabian Journal of Chemistry1878-53522016-05-019347148010.1016/j.arabjc.2015.01.014Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrodeHayati FilikAsiye Aslıhan AvanSevda AydarIn this paper, multi-walled carbon nanotube/Azure A/gold nanoparticle composites (Nafion/AuNPs/AzA/MWCNTs) were prepared by binding gold nanoparticles to the surfaces of Azure A-coated carbon nanotubes. Nafion/AuNPs/AzA/MWCNTs based electrochemical sensor was fabricated for the simultaneous determination of ascorbic acid, dopamine, uric acid, and tryptophan. Cyclic voltammetry and electrochemical impedance spectroscopy were used to characterize the electrochemical properties of the modified electrodes. The modified electrode showed excellent electrocatalytic activity toward ascorbic acid, dopamine, uric acid, and tryptophan (pH 7.0). The experiment results showed that the linear response range for simultaneous detection of AA, DA, UA and Trp were 300–10,000 μM, 0.5–50 μM, 0.5–50 μM and 1.0–100 μM, respectively, and the detection limits were 16 μM, 0.014 μM, 0.028 μM and 0.56 μM (S/N = 3). The proposed method offers promise for simple, rapid, selective and cost-effective analysis of small biomolecules. The procedure was also applied to the determination of tryptophan in spiked milk samples.http://www.sciencedirect.com/science/article/pii/S1878535215000337Multi-walled carbon nanotubesAzure AAscorbic acidDopamineUric acidTryptophan |
| spellingShingle | Hayati Filik Asiye Aslıhan Avan Sevda Aydar Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode Arabian Journal of Chemistry Multi-walled carbon nanotubes Azure A Ascorbic acid Dopamine Uric acid Tryptophan |
| title | Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode |
| title_full | Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode |
| title_fullStr | Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode |
| title_full_unstemmed | Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode |
| title_short | Simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan with Azure A-interlinked multi-walled carbon nanotube/gold nanoparticles composite modified electrode |
| title_sort | simultaneous detection of ascorbic acid dopamine uric acid and tryptophan with azure a interlinked multi walled carbon nanotube gold nanoparticles composite modified electrode |
| topic | Multi-walled carbon nanotubes Azure A Ascorbic acid Dopamine Uric acid Tryptophan |
| url | http://www.sciencedirect.com/science/article/pii/S1878535215000337 |
| work_keys_str_mv | AT hayatifilik simultaneousdetectionofascorbicaciddopamineuricacidandtryptophanwithazureainterlinkedmultiwalledcarbonnanotubegoldnanoparticlescompositemodifiedelectrode AT asiyeaslıhanavan simultaneousdetectionofascorbicaciddopamineuricacidandtryptophanwithazureainterlinkedmultiwalledcarbonnanotubegoldnanoparticlescompositemodifiedelectrode AT sevdaaydar simultaneousdetectionofascorbicaciddopamineuricacidandtryptophanwithazureainterlinkedmultiwalledcarbonnanotubegoldnanoparticlescompositemodifiedelectrode |