The development of monitoring system on water polluters by UV/VIS spectroscopy

Min Chang; Xuedian Zhang; Liuji Xing

doi:10.1117/12.843113

25 November 2009 The development of monitoring system on water polluters by UV/VIS spectroscopy

Min Chang, Xuedian Zhang, Liuji Xing

Proceedings Volume 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 750611 (2009) https://doi.org/10.1117/12.843113
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

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.

Citation Download Citation

Min Chang, Xuedian Zhang, and Liuji Xing "The development of monitoring system on water polluters by UV/VIS spectroscopy", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 750611 (25 November 2009); https://doi.org/10.1117/12.843113

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