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. 2009 Apr 1;114(2):69–81. doi: 10.6028/jres.114.006

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 2 — A model of the light fluxes exciting the cuvette. The incident flux is attenuated by its passage through the cuvette and exits the back of the cuvette as the transmitted flux Φ_t. Along the path of the incident flux, a scatter flux arises due to scattering from particles in the analyte. The scattered flux, Φ_s, exits the cuvette and some of the scattered flux may enter the IS detector. The thick vertical lines represent the cuvette walls each of which transmits a fraction t of the incident flux.