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http://dx.doi.org/10.3807/COPP.2019.3.4.336

Real-time Spectroscopic Methods for Analysis of Organic Compounds in Water  

Kim, Chihoon (Laboratory of Semiconductor Device Research, School of Electronics and Computer Engineering, Chonnam National University)
Ji, Taeksoo (Laboratory of Semiconductor Device Research, School of Electronics and Computer Engineering, Chonnam National University)
Publication Information
Current Optics and Photonics / v.3, no.4, 2019 , pp. 336-341 More about this Journal
Abstract
This paper proposes an optical system where the organic compound content in water is determined by using an ultraviolet (UV) LED (280 nm) and photodetector. The results obtained by the proposed prototype LED spectroscopy system, which includes a single photodetector and two parallel sample holders, are calculated by applying partial least square regression; the values are highly correlated with the actual concentrations of potassium hydrogen phthalate solutions, with an adjusted coefficient of determination about 0.996. Moreover, the total organic carbon values derived from the UV-Vis spectrometer of real samples (lake, river and sea water) differed little from those obtained by the LED spectroscopy. We confirm that the fast, sensitive, and compact LED sensor system can be readily configured for real-time monitoring of organic compounds in water.
Keywords
LED sensor; UV absorbance; Total organic carbon; Spectroscopy; Organic pollution;
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