Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers.
Research has shown that nathoquinone in vitamin K1 interacts with H+ and H2O molecules , during its redox reaction; with [H+] and [H2O] affecting the reduction potential. Using cyclic voltammetry technique, this project continues to investigate the electrochemical properties of vitamin K1 in vario...
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| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/10356/40330 |
| _version_ | 1824456765775806464 |
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| author | Poh, Hwee Ling. |
| author2 | Richard David Webster |
| author_facet | Richard David Webster Poh, Hwee Ling. |
| author_sort | Poh, Hwee Ling. |
| collection | NTU |
| description | Research has shown that nathoquinone in vitamin K1 interacts with H+ and H2O molecules , during its redox reaction; with [H+] and [H2O] affecting the reduction potential. Using cyclic voltammetry technique, this project continues to investigate the electrochemical properties of vitamin K1 in various pH conditions (Britton-Robinson buffer solutions) and at different scan rates with new experimental improvements where nafion and lecithin were used to overcome previous problem of adhering vitamin K1 onto glassy carbon electrode surface. The results obtained show that vitamin K1 in pH3 – 11 undergoes a separate redox reaction mechanism which is different from that in pH13. In pH3 – 11 buffers, a 2 e-/2 H+ transfer occurs while in pH13, a 2 step 1 e-/1H+ each transfer took place and this 2 step reaction gradually changes to assimilate to a 2 e-/2 H+ transfer just like in pH3 – 11; when scan rate increases. The analysis and mechanisms deduced from the results in this experiment are in agreement with the earlier findings on vitamin K1’s electrochemical behavior. |
| first_indexed | 2025-02-19T03:59:18Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/40330 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:59:18Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/403302023-02-28T23:19:43Z Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. Poh, Hwee Ling. Richard David Webster School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry Research has shown that nathoquinone in vitamin K1 interacts with H+ and H2O molecules , during its redox reaction; with [H+] and [H2O] affecting the reduction potential. Using cyclic voltammetry technique, this project continues to investigate the electrochemical properties of vitamin K1 in various pH conditions (Britton-Robinson buffer solutions) and at different scan rates with new experimental improvements where nafion and lecithin were used to overcome previous problem of adhering vitamin K1 onto glassy carbon electrode surface. The results obtained show that vitamin K1 in pH3 – 11 undergoes a separate redox reaction mechanism which is different from that in pH13. In pH3 – 11 buffers, a 2 e-/2 H+ transfer occurs while in pH13, a 2 step 1 e-/1H+ each transfer took place and this 2 step reaction gradually changes to assimilate to a 2 e-/2 H+ transfer just like in pH3 – 11; when scan rate increases. The analysis and mechanisms deduced from the results in this experiment are in agreement with the earlier findings on vitamin K1’s electrochemical behavior. Bachelor of Science in Chemistry and Biological Chemistry 2010-06-14T09:16:55Z 2010-06-14T09:16:55Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/40330 en 40 p. application/pdf |
| spellingShingle | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry Poh, Hwee Ling. Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title | Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title_full | Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title_fullStr | Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title_full_unstemmed | Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title_short | Investigation of electrochemistry of vitamin K1-lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers. |
| title_sort | investigation of electrochemistry of vitamin k1 lipid emulsion films deposited on electrode surface in the presence and absence of nafion multilayers |
| topic | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry |
| url | http://hdl.handle.net/10356/40330 |
| work_keys_str_mv | AT pohhweeling investigationofelectrochemistryofvitamink1lipidemulsionfilmsdepositedonelectrodesurfaceinthepresenceandabsenceofnafionmultilayers |