Performance characteristics of fiber optic lignin concentration sensor

Larry A. Jeffers; John W. Berthold III

doi:10.1117/12.221693

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25 September 1995 Performance characteristics of fiber optic lignin concentration sensor

Larry A. Jeffers, John W. Berthold III

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Proceedings Volume 2510, Fiber Optic and Laser Sensors XIII; (1995) https://doi.org/10.1117/12.221693
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

In the paper-making process, wood chips are cooked to form a pulp, which is subsequently washed, bleached, and rolled into sheets. The mechanical strength, uniformity, and amount of bleach necessary to whiten the paper all depend on the lignin concentration in the wood pulp. In this presentation, we describe the developement of a laser-induced fluorescence method to measure lignin concentration in wood pulp, application of the method to characterize hundreds of different pulp samples obtained from different kinds of wood, and correlation of the results with industry-standard wet chemical Kappa number tests. We report the results of detailed characterization tests performed to determine the sensitivity and repeatability of the method and to quantify cross-sensitivity to other variables such as temperature, consistency, and pH.

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Larry A. Jeffers and John W. Berthold III "Performance characteristics of fiber optic lignin concentration sensor", Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); https://doi.org/10.1117/12.221693

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