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Proceedings Paper

Portable and inexpensive diode laser/fiber optic spectrometer and its application to the determination of ammonia in environmental samples
Author(s): SungHo Kim; Young Soon Noh; Gill Sang Byun; Kyung Ha Lee; DongSun Seo
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Paper Abstract

In order to analyze the aqueous ammonia, we developed a simple and an inexpensive spectrometer, which consisted of a diode laser, an optical fiber with a dipping probe and a photodiode detector. Preliminary results are described here on the performances of the system in terms of the stability of output intensity, sensitivity, and reproducibility. Data on the comparisons of the system with the conventional UV- VIS spectrometer were also given. With the standard indophenol method, the detection limit for the system is 39 (mu) g/L which affords enough sensitivity for the determination of ammonia down to (mu) g/L level. The method was applied to the determination of ammonia in environmental samples including rain and snow. The results shown here indicate a potential for developing a new portable spectrometer useful for the on-site monitoring of environmental samples.

Paper Details

Date Published: 23 February 1999
PDF: 6 pages
Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); doi: 10.1117/12.339784
Show Author Affiliations
SungHo Kim, Soonchunhyang Univ. (South Korea)
Young Soon Noh, Soonchunhyang Univ. (South Korea)
Gill Sang Byun, Soonchunhyang Univ. (South Korea)
Kyung Ha Lee, Soonchunhyang Univ. (South Korea)
DongSun Seo, Myongji Univ. (South Korea)

Published in SPIE Proceedings Vol. 3540:
Chemical, Biochemical, and Environmental Fiber Sensors X
Robert A. Lieberman, Editor(s)

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