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Proceedings Paper

Performance characteristics of fiber optic lignin concentration sensor
Author(s): Larry A. Jeffers; John W. Berthold
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Paper 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.

Paper Details

Date Published: 25 September 1995
PDF: 8 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221693
Show Author Affiliations
Larry A. Jeffers, Babcock & Wilcox Co. (United States)
John W. Berthold, Babcock & Wilcox Co. (United States)


Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII
Ramon P. DePaula; John W. Berthold, Editor(s)

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