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On-line measurement of lignin in wood pulp by color shift of fluorescence

Patent ·
OSTI ID:870267
 [1];  [2]
  1. Washington Township, Stark County, OH
  2. Liberty Township, Trumbull County, OH
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Lignin concentrations from wood pulp samples are measured by applying an excitation light at a selected wavelength to the samples in order to cause the lignin to emit fluorescence. A spectral distribution of the fluorescence emission is then determined. The lignin concentration is then calculated based on the spectral distribution signal. The spectral distribution is quantified by either a wavelength centroid method or a band ratio method.

Research Organization:
BABCOCK & WILCOX CO
DOE Contract Number:
FC05-90CE40905
Assignee:
Babcock & Wilcox Company (New Orleans, LA)
Patent Number(s):
US 5486915
OSTI ID:
870267
Country of Publication:
United States
Language:
English

References (4)

A procedure for tracing of kraft mill effluent from an ocean outfall by constituent fluorescence journal August 1971
A modified fluorometric method for measurement of lignin sulfonates and its in situ application in natural waters journal December 1974
Laser Excited Fluorescence Studies Of Black Liquor conference October 1986
Contribution to On-Line Kraft Pulping Control journal January 1980

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