Sensor and biosensor based on Prussian Blue modified gold and platinum screen printed electrodes
Gold (Au) and platinum (Pt) screen-printed electrodes were modified with Prussian Blue (PB) for the development of amperometric sensors selective for hydrogen peroxide detection. The sensors exhibited sensitivities towards H2O2 equal to 2 A M-1 cm-2 for Au and 1 A M-1 cm-2 for Pt electrodes. The sen...
| Authors: | , , |
|---|---|
| Format: | article |
| Status: | Published version |
| Publication Date: | 2002 |
| Country: | Brasil |
| Institution: | Universidade Estadual Paulista (UNESP) |
| Repository: | Repositório Institucional da UNESP |
| Language: | English |
| OAI Identifier: | oai:repositorio.unesp.br:11449/230923 |
| Online Access: | http://dx.doi.org/10.1016/S0956-5663(02)00185-9 http://hdl.handle.net/11449/230923 |
| Access Level: | Open access |
| Keyword: | Amperometric sensor Biosensor Prussian Blue Screen-printed electrodes |
| Summary: | Gold (Au) and platinum (Pt) screen-printed electrodes were modified with Prussian Blue (PB) for the development of amperometric sensors selective for hydrogen peroxide detection. The sensors exhibited sensitivities towards H2O2 equal to 2 A M-1 cm-2 for Au and 1 A M-1 cm-2 for Pt electrodes. The sensors were also employed as the basis for construction of glucose biosensors through further modification with crystallised glucose oxidase immobilised in a Nafion membrane. In order to improve the operational stability of the modified electrodes a buffer solution containing tetrabutylammonium toluene-4-sulfonate was used. The long-term performance of the sensors and biosensors were evaluated by continuous monitoring of hydrogen peroxide and glucose solutions (50 μM and 1 mM, respectively) in the flow-injection mode for 10 h. © 2002 Elsevier Science B.V. All rights reserved. |
|---|