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Evaluation of 3 Cotton Trash Measurement Methods by Visible / Near-Infrared Reflectance Spectroscopy

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

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008708.(doi:10.13031/2013.29710)
Authors:   Yongliang Liu, Gary Gamble, Devron Thibodeaux
Keywords:   Near infrared spectroscopy, cotton trash, HVI, Shirley analyzer, AFIS

Currently, 3 types of instrumentals have been developed to assess the trash content in lint cotton fibers, namely, Shirley analyzer (SA), advanced fiber information system (AFIS), and high volume instrumentation (HVI). Each of these devices has its unique advantages, and comprehensive comparison between them has not been attempted. Visible / near infrared (NIR) spectroscopy could be a potential and independent tool for their evaluation. Partial least squares (PLS) regression models, relating the spectral response in 400-2500 nm visible/NIR region to the respective SA, AFIS, and HVI readings, were developed in various spectral ranges from two chemometric packages (Foss Vision and Thermo Grams/AI) and then compared. Because of different strategies to select calibration and validation samples between two commercial packages, resultant NIR trash models were inconsistent. 2 HVI and AFIS readings were observed to have better model performances in Thermo Grams/AI approach than in Foss Vision, and are acceptable for quantitative determination of cotton trash content. Furthermore, considering the different sampling species between reference and spectral measurement, 90% confidential interval was applied to remove outlier samples. The recalibrated models verified that HVI trash module might be the most promising one in precise and accurate determination of trash content in lint cottons.

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