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

Kim, Chihoon;Ji, Taeksoo

  • Received : 2019.04.26
  • Accepted : 2019.06.28
  • Published : 2019.08.25

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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Acknowledgement

Supported by : National Research Foundation of Korea