23 February 1999 Portable and inexpensive diode laser/fiber optic spectrometer and its application to the determination of ammonia in environmental samples
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Proceedings Volume 3540, Chemical, Biochemical, and Environmental Fiber Sensors X; (1999) https://doi.org/10.1117/12.339784
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
SungHo Kim, SungHo Kim, Young Soon Noh, Young Soon Noh, Gill Sang Byun, Gill Sang Byun, Kyung Ha Lee, Kyung Ha Lee, DongSun Seo, DongSun Seo, } "Portable and inexpensive diode laser/fiber optic spectrometer and its application to the determination of ammonia in environmental samples", Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); doi: 10.1117/12.339784; https://doi.org/10.1117/12.339784
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