Nitrate determination in natural waters by spectral photometry with a miniaturized fiber-coupled flow cell

Juergen Vogel; Guenter Schwotzer; Reinhardt Willsch; M. Koch; K. Bley

doi:10.1117/12.566646

9 June 2004 Nitrate determination in natural waters by spectral photometry with a miniaturized fiber-coupled flow cell

Juergen Vogel, Guenter Schwotzer, Reinhardt Willsch, M. Koch, K. Bley

Proceedings Volume 5502, Second European Workshop on Optical Fibre Sensors; (2004) https://doi.org/10.1117/12.566646
Event: Second European Workshop on Optical Fibre Sensors, 2004, Santander, Spain

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.

Citation Download Citation

Juergen Vogel, Guenter Schwotzer, Reinhardt Willsch, M. Koch, and K. Bley "Nitrate determination in natural waters by spectral photometry with a miniaturized fiber-coupled flow cell", Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); https://doi.org/10.1117/12.566646

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