Fibre-optic fluorescing sensor for ammonia |
| |
Authors: | Otto S Wolfbeis Hermann E Posch |
| |
Institution: | Institut für Organische Chemie, Karl-Franzens-Universität, A-8010 Graz Austria |
| |
Abstract: | The fluorescing sensor is based on the change in fluorescence intensity of a buffered pH indicator solution entrapped in silicone rubber. Exposure to ammonia increases the pH of the trapped solution; this increases the fluorescence intensity, which is monitored via an optical fibre bundle. Ammonium chloride in 0.001 M sodium hydroxide, or the indicators themselves, can serve as buffers. Effects of sensor preparation and buffer composition on response time, reversibility and sensitivity are discussed. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|