| Autor: |
Perez de Vargas-Sansalvador IM; Department of Analytical Chemistry, Faculty of Sciences, Campus Fuentenueva, University of Granada, 18071 Granada, Spain., Fay C, Fernandez-Ramos MD, Diamond D, Benito-Lopez F, Capitan-Vallvey LF |
| Jazyk: |
angličtina |
| Zdroj: |
Analytical and bioanalytical chemistry [Anal Bioanal Chem] 2012 Dec; Vol. 404 (10), pp. 2851-8. Date of Electronic Publication: 2012 Aug 16. |
| DOI: |
10.1007/s00216-012-6307-x |
| Abstrakt: |
A portable instrument for oxygen determination, based on the quenching of phosphorescent octaethylporphyrin by gaseous O(2), has been developed using the fluorimetric paired emitter-detector diode technique (FPEDD). The instrument configuration consists of two light-emitting diodes (LEDs) facing each other, with an interchangeable support containing a phosphorescent membrane in between, in which one of the LEDs is used as the light source (emitter LED) and the other, working in reverse bias mode, as the light detector. The feasibility of using a LED as a luminescence detector is studied. Its small size enables integration of the instrument into a portable measurement system. A systematic study of the system capabilities as a portable instrument was performed to optimize range, sensitivity, short term and long term stability, dynamic behaviour, effect of temperature and humidity, and temporal drift. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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