Use of Near Infrared Spectroscopy to Measure the Chemical and Mechanical Properties of Solid Wood

Stephen S. Kelley, Timothy G. Rials, Rebecca Snell, Leslie H. Groom, Amie Sluiter

Research output: Contribution to journalArticlepeer-review

201 Scopus Citations

Abstract

Near infrared (NIR) spectroscopy (500 nm-2400 nm), coupled with multivariate analytic (MVA) statistical techniques, have been used to predict the chemical and mechanical properties of solid loblolly pine wood. The samples were selected from different radial locations and heights of three loblolly pine trees grown in Arkansas. The chemical composition and mechanical properties were measured with traditional wet chemical techniques and three point bending tests, respectively. The microfibril angle was measured with x-ray scattering. These chemical and mechanical properties were correlated with the NIR spectra using projection to latent structures (PLS) models. The correlations were very strong, with the correlation coefficients generally above 0.80. The mechanical properties could also be predicted using a reduced spectral range (650 nm-1150 nm) that should allow for field measurements of these properties using handheld NIR spectrometers.

Original languageAmerican English
Pages (from-to)257-276
Number of pages20
JournalWood Science and Technology
Volume38
Issue number4
DOIs
StatePublished - 2004

NREL Publication Number

  • NREL/JA-510-36912

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