Portable and inexpensive diode laser/fiber optic spectrometer and its application to the determination of ammonia in environmental samples

SungHo Kim; Young Soon Noh; Gill Sang Byun; Kyung Ha Lee; DongSun Seo

doi:10.1117/12.339784

23 February 1999 Portable and inexpensive diode laser/fiber optic spectrometer and its application to the determination of ammonia in environmental samples

SungHo Kim, Young Soon Noh, Gill Sang Byun, Kyung Ha Lee, DongSun Seo

Author Affiliations +

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.

Citation Download Citation

SungHo Kim, Young Soon Noh, Gill Sang Byun, Kyung Ha Lee, and 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); https://doi.org/10.1117/12.339784

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