A novel tangential photopyroelectric (PPE) cell for liquids is described in which the excitation laser beam is position-modulated. As a result, only the thermal wave is modulated and the background signal due to scattered light is suppressed by more than 50 times. The application for water pollution monitoring shows a detection limit of 1 mmol/m3 ammonium ion in water.
|Journal||Journal De Physique. IV : JP|
|Publication status||Published - Jan 1 1994|
|Event||Proceedings of the 8th International Topical Meeting on Photoacoustic and Photothermal Phenomena - Guadeloupe, Fr|
Duration: Jan 22 1994 → Jan 25 1994
ASJC Scopus subject areas
- Physics and Astronomy(all)