Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae
Fucoidans are sulfated polysaccharides mostly derived from algae and used in a number of applications (e.g. nutrition, cosmetics, pharmaceuticals and biomaterials). In this study, the electrochemical behaviour of fucoidans extracted from two algal species (Undaria pinnatifida and Fucus vesiculosus)...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Royal Society of Chemistry
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/56897 |
| _version_ | 1848759964349235200 |
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| author | Felisilda, B. Alvarez De Eulate, E. Stringer, D. Fitton, J. Arrigan, Damien |
| author_facet | Felisilda, B. Alvarez De Eulate, E. Stringer, D. Fitton, J. Arrigan, Damien |
| author_sort | Felisilda, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Fucoidans are sulfated polysaccharides mostly derived from algae and used in a number of applications (e.g. nutrition, cosmetics, pharmaceuticals and biomaterials). In this study, the electrochemical behaviour of fucoidans extracted from two algal species (Undaria pinnatifida and Fucus vesiculosus) was assessed using voltammetry at an array of micro-interfaces formed between two immiscible electrolyte solutions (µITIES) in which the organic electrolyte phase was gelled. Cyclic voltammetry revealed an adsorption process when scanning to negative potentials, followed by a desorption peak at ca. -0.50 V on the reverse scan, indicating the electroactivity of both fucoidans. U. pinnatifida fucoidan showed a more intense voltammetric signal compared to F. vesiculosus fucoidan. In addition, use of tridodecylmethylammonium (TDMA + ) or tetradodecylammonium (TDDA + ) as the organic phase electrolyte cation provided improved detection of both fucoidans relative to the use of bis(triphenylphosphoranylidene)ammonium (BTPPA + ) cation. Application of adsorptive stripping voltammetry provided a linear response of current with fucoidan concentration in the range 2-20 µg mL -1 for U. pinnatifida fucoidan (with TDMA + ) and 10-100 µg mL -1 for F. vesiculosus fucoidan (with TDDA + ). The combination of TDMA + in the organic phase and adsorptive pre-concentration for 180 s afforded a detection limit of 1.8 µg mL -1 fucoidan (U. pinnatifida) in aqueous phase of 10 mM NaOH and 2.3 µg mL -1 in synthetic urine (pH adjusted). These investigations demonstrate the electroactivity of fucoidans at the µITIES array and provide scope for their detection at low µg mL -1 concentrations using this approach. |
| first_indexed | 2025-11-14T10:08:15Z |
| format | Journal Article |
| id | curtin-20.500.11937-56897 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:08:15Z |
| publishDate | 2017 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-568972018-01-11T03:12:07Z Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae Felisilda, B. Alvarez De Eulate, E. Stringer, D. Fitton, J. Arrigan, Damien Fucoidans are sulfated polysaccharides mostly derived from algae and used in a number of applications (e.g. nutrition, cosmetics, pharmaceuticals and biomaterials). In this study, the electrochemical behaviour of fucoidans extracted from two algal species (Undaria pinnatifida and Fucus vesiculosus) was assessed using voltammetry at an array of micro-interfaces formed between two immiscible electrolyte solutions (µITIES) in which the organic electrolyte phase was gelled. Cyclic voltammetry revealed an adsorption process when scanning to negative potentials, followed by a desorption peak at ca. -0.50 V on the reverse scan, indicating the electroactivity of both fucoidans. U. pinnatifida fucoidan showed a more intense voltammetric signal compared to F. vesiculosus fucoidan. In addition, use of tridodecylmethylammonium (TDMA + ) or tetradodecylammonium (TDDA + ) as the organic phase electrolyte cation provided improved detection of both fucoidans relative to the use of bis(triphenylphosphoranylidene)ammonium (BTPPA + ) cation. Application of adsorptive stripping voltammetry provided a linear response of current with fucoidan concentration in the range 2-20 µg mL -1 for U. pinnatifida fucoidan (with TDMA + ) and 10-100 µg mL -1 for F. vesiculosus fucoidan (with TDDA + ). The combination of TDMA + in the organic phase and adsorptive pre-concentration for 180 s afforded a detection limit of 1.8 µg mL -1 fucoidan (U. pinnatifida) in aqueous phase of 10 mM NaOH and 2.3 µg mL -1 in synthetic urine (pH adjusted). These investigations demonstrate the electroactivity of fucoidans at the µITIES array and provide scope for their detection at low µg mL -1 concentrations using this approach. 2017 Journal Article http://hdl.handle.net/20.500.11937/56897 10.1039/c7an00761b http://creativecommons.org/licenses/by-nc/3.0/ Royal Society of Chemistry fulltext |
| spellingShingle | Felisilda, B. Alvarez De Eulate, E. Stringer, D. Fitton, J. Arrigan, Damien Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title | Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title_full | Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title_fullStr | Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title_full_unstemmed | Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title_short | Electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| title_sort | electrochemical behaviour at a liquid-organogel microinterface array of fucoidan extracted from algae |
| url | http://hdl.handle.net/20.500.11937/56897 |