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Proceedings Paper

Nitrate determination in natural waters by spectral photometry with a miniaturized fiber-coupled flow cell
Author(s): Juergen Vogel; Guenter Schwotzer; Reinhardt Willsch; M. Koch; K. Bley
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Paper Abstract

For in situ monitoring of natural waters in respect of impurities miniaturized spectral analytical systems become more and more important. A case in point are nitrate impurities, which can be detected by absorption spectroscopy in the ultra violet (uv) spectral range between 200 and 350 nm. Using uv-transmitting optical fibers, a microoptical flow cell, a miniature polychromator and a deuterium light source, a miniaturized spectral photometer for nitrate detection has been developed. The spectral photometer is a key component in an automatic analyzer for in situ measurements in natural waters. To separate the nitrate absorption from the superposition of other uv-absorbing contaminations, for instance nitrite, carbonate and huminic acids, a multi-component analysis (MCA) software has been applied to the detected absorption spectra. The analyzer is suited for the permanent monitoring of nitrate, nitrite and carbonate in inland waters.

Paper Details

Date Published: 9 June 2004
PDF: 4 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566646
Show Author Affiliations
Juergen Vogel, Institute for Physical High Technology (Germany)
Guenter Schwotzer, Institute for Physical High Technology (Germany)
Reinhardt Willsch, Institute for Physical High Technology (Germany)
M. Koch, -4H-JENA engineering GmbH (Germany)
K. Bley, -4H-JENA engineering GmbH (Germany)

Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors
Jose Miguel Lopez-Higuera; Brian Culshaw, Editor(s)

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