Determination of ammonia in a flow injection cell using the diode laser fiber optic colorimetric spectrometer

SungHo Kim; Sung Man Nam; Gill Sang Byun; Shin-Young Yun; Seongsik Hong; Jong Shin Yoo

doi:10.1117/12.379574

15 March 2000 Determination of ammonia in a flow injection cell using the diode laser fiber optic colorimetric spectrometer

SungHo Kim, Sung Man Nam, Gill Sang Byun, Shin-Young Yun, Seongsik Hong, Jong Shin Yoo

Author Affiliations +

Proceedings Volume 3912, Micro- and Nanotechnology for Biomedical and Environmental Applications; (2000) https://doi.org/10.1117/12.379574
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

Abstract

The determination of ammonia has been studied using a compact diode laser/fiber optic colorimetric spectrometer combined with a flow injection cell. This system is mainly based on the diode laser at 638 nm. The flow rate and the molar concentration of reagents for indophenol formation in flows were specified through the experiment of optimization. The relationship between the colorimetric absorption signal and the concentration of injected ammonia was found to be linear over the three orders of magnitude indicating a practical dynamic range of the system. In the linear region, a correlation coefficient was 0.9996 and the detection limit was 4 (mu) g/L. This spectrometer as an ammonia analyzer is appropriate for environmental and industrial monitoring applications.

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SungHo Kim, Sung Man Nam, Gill Sang Byun, Shin-Young Yun, Seongsik Hong, and Jong Shin Yoo "Determination of ammonia in a flow injection cell using the diode laser fiber optic colorimetric spectrometer", Proc. SPIE 3912, Micro- and Nanotechnology for Biomedical and Environmental Applications, (15 March 2000); https://doi.org/10.1117/12.379574

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