Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode
A novel and simple method for the direct and quantitative determination of L-tryptophan (Trp), L-tyrosine (Tyr) and L-cysteine (Cys) was proposed in this work. Carbon nanofibers (CNFs), made by electrospinning technique, were used to modify carbon paste electrode (CPE) without any treatment to study...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/22498 |
| _version_ | 1848750886586679296 |
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| author | Tang, X. Liu, Yang Hou, H. You, T. |
| author_facet | Tang, X. Liu, Yang Hou, H. You, T. |
| author_sort | Tang, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A novel and simple method for the direct and quantitative determination of L-tryptophan (Trp), L-tyrosine (Tyr) and L-cysteine (Cys) was proposed in this work. Carbon nanofibers (CNFs), made by electrospinning technique, were used to modify carbon paste electrode (CPE) without any treatment to study the electrochemical behaviors of the three amino acids using cyclic voltammetry (CV) and constant potential amperometric method. The results demonstrated that the CNFs modified carbon paste electrode (CNFCPE) exhibited high electrocatalytic activity and good analytical performance towards the oxidation of the three amino acids. The linear ranges of Trp, Tyr and Cys were 0.1–119, 0.2–107 and 0.15–64Mwith correlation coefficients of 0.9994, 0.9985 and 0.9996, respectively. All the detection limits of the analytes were 0.1M(S/N = 3). In addition, the CNF-CPE displayed good reproducibility, high sensitivity and good selectivity towards the determination of the amino acids, making it suitable for the determination of Trp, Tyr and Cys in clinical and medicine. |
| first_indexed | 2025-11-14T07:43:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-22498 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:43:57Z |
| publishDate | 2010 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-224982017-09-13T13:54:26Z Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode Tang, X. Liu, Yang Hou, H. You, T. Tryptophan Modified electrode Cysteine Tyrosine Carbon nanofibers Electrocatalytic oxidation A novel and simple method for the direct and quantitative determination of L-tryptophan (Trp), L-tyrosine (Tyr) and L-cysteine (Cys) was proposed in this work. Carbon nanofibers (CNFs), made by electrospinning technique, were used to modify carbon paste electrode (CPE) without any treatment to study the electrochemical behaviors of the three amino acids using cyclic voltammetry (CV) and constant potential amperometric method. The results demonstrated that the CNFs modified carbon paste electrode (CNFCPE) exhibited high electrocatalytic activity and good analytical performance towards the oxidation of the three amino acids. The linear ranges of Trp, Tyr and Cys were 0.1–119, 0.2–107 and 0.15–64Mwith correlation coefficients of 0.9994, 0.9985 and 0.9996, respectively. All the detection limits of the analytes were 0.1M(S/N = 3). In addition, the CNF-CPE displayed good reproducibility, high sensitivity and good selectivity towards the determination of the amino acids, making it suitable for the determination of Trp, Tyr and Cys in clinical and medicine. 2010 Journal Article http://hdl.handle.net/20.500.11937/22498 10.1016/j.talanta.2009.11.027 Elsevier restricted |
| spellingShingle | Tryptophan Modified electrode Cysteine Tyrosine Carbon nanofibers Electrocatalytic oxidation Tang, X. Liu, Yang Hou, H. You, T. Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title | Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title_full | Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title_fullStr | Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title_full_unstemmed | Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title_short | Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode |
| title_sort | electrochemical determination of l-tryptophan, l-tyrosine and l-cysteine using electrospun carbon nanofibers modified electrode |
| topic | Tryptophan Modified electrode Cysteine Tyrosine Carbon nanofibers Electrocatalytic oxidation |
| url | http://hdl.handle.net/20.500.11937/22498 |