Studies to Measure Cotton Fibre Length, Strength, Micronaire and Colour by Vis/NIR Reflectance Spectroscopy. Part I: Descriptive Statistics of Fibre Properties and Reflectance Spectra

Montalvo, Joseph G.; Faught, Sherman E.; Ramey, H. H.; Buco, Steven E.

doi:10.1255/jnirs.19

Cited by 8 publications

(10 citation statements)

References 7 publications

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“…Calibration and method development was performed for two spectral regions -the entire spectrum (1100-2300 nm) and a tighter NIR spectral region with the peak at approximately 1930 nm removed from the calibration. The entire spectrum from 1100-2300 nm has been shown to be an acceptable calibration spectral range for NIR micronaire calibrations with scanning instruments [14,15]. The large NIR absorbance at approximately 1930 nm observed for cotton fiber has been identified as due to fiber moisture [2].…”

Section: Chemometric Software and Data Analysismentioning

confidence: 99%

Near Infrared Measurement of Cotton Fiber Micronaire by Portable Near Infrared Instrumentation

Rodgers

Fortier

Montalvo

et al. 2010

Textile Research Journal

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In the U.S.A., cotton is classed (primary quality parameters) by the Uster ® High Volume Instrument (HVI), which must be maintained under tightly controlled laboratory environmental conditions. Improved and fast response quality measurement systems and tools are needed to rapidly assess the quality of cotton. One key area of emphasis and need is the development and implementation of new fast-response quality measurements that can be used not only in the laboratory but which also can be adapted to field and at-line quality measurements. A program was implemented to determine the ability of portable nearinfrared (NIR) instrumentation to monitor critical fiber properties of cotton samples in the laboratory, at-line, and in the field, with initial emphasis on the laboratory measurement of cotton fiber micronaire. Micronaire is a key cotton property, and it is an indicator of the fiber's maturity and fineness. Distinct NIR spectral differences between samples with varying micronaire were observed. A comparative evaluation was performed to determine optimum instrumental conditions for laboratory cotton micronaire measurements. The comparative evaluation established that the optimum instrumental conditions for laboratory measurements of micronaire was obtained with the use of a glass-covered sampling port and increased instrumental gain, with high R 2 values, low residuals, and with ≤ 12% outliers. For a NIR measurement with potential for multiple simultaneous analyses and non-laboratory measurements, the micronaire measurement was fast (< 3 min per sample) and easy to perform. The rapid and accurate laboratory measurement of cotton fiber micronaire with portable NIR instrumentation was demonstrated.

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Section: Chemometric Software and Data Analysismentioning

confidence: 99%

Near Infrared Measurement of Cotton Fiber Micronaire by Portable Near Infrared Instrumentation

Rodgers

Fortier

Montalvo

et al. 2010

Textile Research Journal

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“…Montalvo and colleagues examined the potential of a bench-top, scanning visible-NIR instrument to measure fiber micronaire. 20,21 Using principal components regression (PCR) models, PCR models in the 1100-2498 nm spectral region yielded the best results, with R 2 > 0.9 and low standard errors of prediction (SEPs) were observed. Thomasson and Shearer examined the relationships between NIR reflectance and fiber quality characteristics, including micronaire, using a bench-top, scanning NIR instrument in the range of 1100-2500 nm.…”

Section: An Overview Of Cotton Fiber Micronaire Measurements By Near-mentioning

confidence: 99%

Cotton Micronaire Measurements Using Small Portable Near-Infrared (NIR) Analyzers

Zumba

Rodgers

2016

Appl Spectrosc

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A key quality and processing parameter for cotton fiber is micronaire, which is a function of the fiber's maturity and fineness. Near-infrared (NIR) spectroscopy has previously shown the ability to measure micronaire, primarily in the laboratory and using large, research-grade laboratory NIR instrumentation. International interest has been expressed by the industry in the measurement of fiber micronaire using small, portable NIR spectroscopy instruments for both laboratory and outside the laboratory (e.g., field or greenhouse) locations. New, very small NIR micro-spectrometers have been commercialized that offer the potential advantages of smaller size and lower weight, lower cost, and increased portability over current portable units. A program was implemented to determine the feasibility of a small NIR microspectrometer to measure fiber micronaire both in the laboratory and outside the laboratory, with initial emphasis on laboratory measurements prior to moving to field evaluations. In the laboratory, distinct spectral differences with increasing micronaire were observed. Optimal sampling and instrumental procedures and protocols for two units (different spectral wavelength capabilities) were established. Comparative evaluations established very good method micronaire agreement between the micro-spectrometer and a standard portable spectrometer, with high Regression (R) value, low residuals, and few outliers (less than 20%). The NIR micro-spectrometer measurements were fast (<1 min per sample), required no sample preparation, and were easy to perform. All end-state criteria were exceeded. The rapid and accurate laboratory measurement of fiber micronaire with a NIR micro-spectrometer was demonstrated.

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“…The properties had been measured by repeat observations on Motion Control and Spinlab HVI systems placed side-by-side. 1 There were 420 replicate values on each HVI of each sample or a total of 840 replicates on each cotton.…”

Section: Samples and Spectramentioning

confidence: 99%

“…poor spectral precision) associated with cotton in the standard size sample cell provided by the manufacturer. 1 Table 8 shows that the standard error of prediction of UHM is very sensitive to repack error. (The first line of data is taken from Table 6; UI and STR SEPs are presented for comparison purposes.…”

Section: Uhm Sepmentioning

confidence: 99%

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Studies to Measure Cotton Fibre Length, Strength, Micronaire and Colour by vis/NIR Reflectance Spectroscopy. Part II: Principal Components Regression

Montalvo

Buco

Ramey

1994

Journal of Near Infrared Spectroscopy

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In Part I of this series, both cotton fibre property and reflectance spectra data on 185 US cottons including four Pimas were analysed by descriptive statistics. In this paper, principal components regression (PCR) models for measuring six properties from the cotton's vis/NIR reflectance spectra are critically examined. These properties are upper-half mean length (UHM), uniformity index (UI), bundle strength (STR), micronaire (MIC) and colour (Rd and +b). The spectra were recorded with a scanning spectrophotometer in the wavelength range from 400 to 2498 nm. A variety of spectral processing options, some of which give improved PCR analysis results, were applied prior to the regressions and allowed for testing of over 100 PCR models. All PCR model results are based on the PRESS statistic by one-out-rotation, a fast approximation of the PRESS statistic (to reduce computer time) or on cluster analysis using separate calibration and validation data sets. The standard error of prediction (SEP) of all the properties except UHM compared well to the reference method precision. The precision of the UHM measure by reflectance spectroscopy was strongly influenced by the sample repack error. The SEP of UHM, UI and STR was improved by excluding the Pimas from the data set.

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Studies to Measure Cotton Fibre Length, Strength, Micronaire and Colour by Vis/NIR Reflectance Spectroscopy. Part I: Descriptive Statistics of Fibre Properties and Reflectance Spectra

Cited by 8 publications

References 7 publications

Near Infrared Measurement of Cotton Fiber Micronaire by Portable Near Infrared Instrumentation

Near Infrared Measurement of Cotton Fiber Micronaire by Portable Near Infrared Instrumentation

Cotton Micronaire Measurements Using Small Portable Near-Infrared (NIR) Analyzers

Studies to Measure Cotton Fibre Length, Strength, Micronaire and Colour by vis/NIR Reflectance Spectroscopy. Part II: Principal Components Regression

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