Position modulated tangential photopyroelectric (PPE) spectrometry for low absorptions in liquids

M. Chirtoc, Z. Bozoki, D. Bicanic, J. Gibkes

Research output: Contribution to journalConference article

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Abstract

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.

Original languageEnglish
Pages (from-to)C7-63-66
JournalJournal De Physique. IV : JP
Volume4
Issue number7
Publication statusPublished - Jan 1 1994
EventProceedings of the 8th International Topical Meeting on Photoacoustic and Photothermal Phenomena - Guadeloupe, Fr
Duration: Jan 22 1994Jan 25 1994

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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