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Sample contamination in analysis of wood pulp fibers with x-ray photoelectron spectroscopy

Author:
Li, K., Reeve, D.W.
Source:
Journal of wood chemistry and technology 2004 v.24 no.3 pp. 183-200
ISSN:
0277-3813
Subject:
wood pulp, wood fibers, kraft pulp, lignin, chemical analysis, X-ray photoelectron spectroscopy
Abstract:
Contamination of wood pulp fiber samples by the ambient in the x-ray photoelectron spectroscopy (XPS) analysis was investigated. Various control samples, including platinum foil, cellophane, cellobiose, rayon, cotton, and fully bleached wood pulp fibers, were used for identification and characterization of the contamination sources. It has been found that contaminating material on wood fiber surfaces contains both carbon and oxygen and is responsible for the discrepancy between the true elemental composition of wood pulp fiber surfaces and the composition determined by XPS. A physical model of the contamination has been proposed which allows compensation for the contamination in quantitative analysis of surface lignin by XPS.
Agid:
1435866