Dr. Jerry Workman, Bob Schumann, Dr. Arnold Eilert, Dr. Jan-Ake Persson and Rob Gajewski have descibed diagnostic tests intended to evaluate instrument performance. The testing procedures and materials are detailed, the mathematical calculations are specified, and then a true comparitive study of current NIR instrumentation is presented. This is an update November 2016 with SpectraStar XT data added.
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