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Proceedings Paper

Tunable deep-UV Raman spectroscopy reveals nitrate photolysis
Author(s): A. Sterzi; U. Schneider; O. Sambalova; D. Bleiner; A. Borgschulte
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Paper Abstract

Deep-UV Raman spectroscopy is a promising method for the analysis of nitrates and nitrites in water at ppm (mg/l) concentrations. In addition to the high sensitivity, the tunability of the laser source allows to deeper investigate the photoinduced reactions taking place under deep-UV illumination. Under these conditions, nitrate ions decompose into oxygen and nitrite through different reaction pathways. Analysis of the evolution of nitrate and nitrite Raman modes as a function of the excitation wavelength allows for estimating the photo-energy dependent quantum yield of the photolysis process. The results highlight the limits and capabilities of deep UV Raman as a on-line nitrate and nitrite monitoring method.

Paper Details

Date Published: 9 September 2019
PDF: 9 pages
Proc. SPIE 11086, UV and Higher Energy Photonics: From Materials to Applications 2019, 1108605 (9 September 2019); doi: 10.1117/12.2529383
Show Author Affiliations
A. Sterzi, EMPA (Switzerland)
U. Schneider, Rascope AG (Switzerland)
O. Sambalova, EMPA (Switzerland)
Univ. Zürich (Switzerland)
D. Bleiner, EMPA (Switzerland)
Univ. Zürich (Switzerland)
A. Borgschulte, EMPA (Switzerland)
Univ. Zürich (Switzerland)

Published in SPIE Proceedings Vol. 11086:
UV and Higher Energy Photonics: From Materials to Applications 2019
Gilles Lérondel; Yong-Hoon Cho; Atsushi Taguchi; Satoshi Kawata, Editor(s)

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