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A Comparison of Optical Measurements in Turbid Media

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1000030.(doi:10.13031/2013.29604)
Authors:   Paul Martinsen, V Andrew McGlone, Biju Cletus, Rainer Künnemeyer, Robert B Jordan
Keywords:   temperature, scattering media, absorption coefficient, partial least squares, multispectral calibration

Accuracy and precision are typically among the most important factors in the design of an optical measurement system for quantitative assay of natural products. Often the variation expected in the constituent and absorber of interest is smallperhaps less than 20% of the mean as for soluble-solid concentration in Kiwifruit, for example. Most natural products in their raw form are not pure absorbers: they also scatter light. This complicates the measurement problem as scatter can introduce variation far greater than the absorption we are trying to measure.

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