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Proceedings Paper

The development of monitoring system on water polluters by UV/VIS spectroscopy
Author(s): Min Chang; Xuedian Zhang; Liuji Xing
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Paper Abstract

UV/VIS spectroscopy has been proved to be an effective way for monitoring water quality non-invasively. However, the present method can only provide the synthesized information of the water pollution by using the sum parameters like TOC, DOC or TSS. The changes in the composition of the water cannot be detected. For monitoring water polluters, a UV/VIS spectrometer for in-situ and on-line measurements has been developed. It utilizes the UV/VIS range (200-750 nm) for the pollutant component measurement. A Xenon lamp is used as a light source. Fiber sensor is used as a probe and the diffuse reflectance spectra of the water are measured for the in-situ application. In order to measure the different polluters, a diffuse reflectance board, the position of which can be adjusted to the optical length of the measured polluters, is installed the front of the fiber. The spectra of the water can be measured in 5s. Then the method of the differential optical absorbance spectroscopy (DOAS) is employed to decrease the interference from the common mode noise. Finally, the polluter's concentrations can be derived by calibration between the UV/VIS spectra and the reference concentrations of the calibrate sample set by using Partial-Least-Square (PLS) regression.

Paper Details

Date Published: 26 November 2009
PDF: 8 pages
Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 750611 (26 November 2009); doi: 10.1117/12.843113
Show Author Affiliations
Min Chang, Univ. of Shanghai for Science and Technology (China)
Xuedian Zhang, Univ. of Shanghai for Science and Technology (China)
Liuji Xing, Univ. of Shanghai for Science and Technology (China)


Published in SPIE Proceedings Vol. 7506:
2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments

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