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

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870267

Jeffers, Larry A ^[1]; Malito, Michael L ^[2]

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1. Washington Township, Stark County, OH
2. Liberty Township, Trumbull County, OH

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

Related Subjects

on-line
measurement
lignin
wood
pulp
color
shift
fluorescence
concentrations
samples
measured
applying
excitation
light
selected
wavelength
emit
spectral
distribution
emission
determined
concentration
calculated
based
signal
quantified
centroid
method
band
ratio
spectral distribution
selected wavelength
excitation light
fluorescence emission
lignin concentration
wood pulp
calculated based
ratio method
selected wave
/356/162/250/