A Fiber-Optic Sensor Based on Attenuated-Total-Reflection Technique for Monitoring Turbid Media
A fiber-optic sensor based on attenuated total reflectance technique for extraction chemical information from highly scattering turbid materials has been evaluated. The influence of particles on bulk absorption and evanescent wave absorbance of micron-sized graphite flakes and spherical glassy carbon suspensions were investigated. The bulk absorption measurement is not suitable for the analysis of turbid media due to high scattering of particles. The evanescent wave absorbance of coiled fiber-optic sensor in those suspensions with various concentrations is insensitive to scattering of suspended particles, especially for graphite flake suspensions. The reason for different influence of graphite flakes and spherical glassy carbon particles suspensions on evanescent wave absorbance was analyzed. This study demonstrates that fiber-optic sensor based on attenuated total reflectance technique is a feasible, on-line and in situ device in application for monitoring turbid suspensions.
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Document Type: Research Article
Publication date: 01 January 2012
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