Sample Area Optimization in a Diffuse Reflectance Near-Infrared Spectrophotometer

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Diffuse reflectance spectrophotometry of particulate samples is affected by a number of error sources if the particles have appreciable diameters. Foremost among these are the spectral distortions that arise when individual particles become optically thick. Current practice avoids this error by working in the near-infrared spectral domain, where reduced absorptivity usually insures that the particles will be optically thin.

Keywords: Infrared; NIR instrumentation; Reflectance spectroscopy

Document Type: Short Communication


Affiliations: Lawrence Livermore National Laboratory, Livermore, California 94550

Publication date: November 1, 1985

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