PHOTON-COUNTING OPTICAL-FIBER SENSOR FOR THE DETECTION OF AMMONIA IN NEUROCHEMICAL APPLICATIONS

Authors
ELAMARI A GISIN N MUNOZ JL POITRY S TSACOPOULOS M ZBINDEN H
Citation
A. Elamari et al., PHOTON-COUNTING OPTICAL-FIBER SENSOR FOR THE DETECTION OF AMMONIA IN NEUROCHEMICAL APPLICATIONS, Sensors and actuators. B, Chemical, 38(1-3), 1997, pp. 183-188
Citations number
11
Categorie Soggetti
Electrochemistry,"Chemistry Analytical","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
38
Issue
1-3
Year of publication
1997
Pages
183 - 188
Database
ISI
SICI code
0925-4005(1997)38:1-3<183:POSFTD>2.0.ZU;2-W
Abstract
We report our progress in developing a miniaturized version of an opti cal-fiber sensor for the measurement of ammonia. The principle of the measurement is based on the combination of photon counting and fluores cence from a pH indicator. This sensor has been developed in order to monitor the release of ammonia by photoreceptors of the honeybee drone retina under stimulation by light or by a chemical. It has a dynamic of 25 dB and a detection limit of 30 nM. Sensors for other chemicals c ould be constructed on the same principle, by simply changing the indi cator used.