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Licensed Unlicensed Requires Authentication Published by De Gruyter March 27, 2008

FT-NIR spectroscopy in predicting the decay resistance related characteristics of solid Scots pine (Pinus sylvestris L.) heartwood

Asta Leinonen, Anni M. Harju, Martti Venäläinen, Pekka Saranpää and Tapio Laakso
From the journal

Abstract

FT-NIR spectroscopy equipped with a fiber optic probe was used to predict the mass loss caused by a brown-rot fungus (Coniophora puteana) in Scots pine heartwood. Because decay tests are impractical for generating reference data for the calibration of prediction models, the possibilities of using the concentration of heartwood extractives as a reference variable instead of mass loss was studied. The material investigated covered a wide range of natural variation in durability and diffuse reflectance infrared Fourier transform spectra were recorded from the cross section of 41 pines. The partial least square (PLS) regression models were found to be satisfactory for prediction of the mass loss and the concentration of extractives (total phenolics, resin acids, pinosylvin and pinosylvin monomethyl ether). It was concluded that FT-NIR spectroscopy has the potential to become a tool for the decay resistance grading of Scots pine heartwood timber, especially if the prediction models will be based on heartwood extractives.


Corresponding author. Measurement and Sensor Laboratory, University of Oulu, Technology Park 127, FI-87400 Kajaani, Finland Phone: +358-44-353-3681 Fax: +358-8-614-9615

Received: 2007-5-22
Accepted: 2007-10-17
Published Online: 2008-03-27
Published Online: 2008-12-10
Published in Print: 2008-05-01

©2008 by Walter de Gruyter Berlin New York