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Near infrared spectroscopy (NIRS) as a potential tool for monitoring trade of similar woods: Discrimination of true mahogany, cedar, andiroba, and curupixá

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Published/Copyright: November 1, 2010
Holzforschung
From the journal Holzforschung Volume 65 Issue 1

Abstract

Mahogany is one of the most valuable woods and was widely used until it was included in Appendix II of the Convention on International Trade in Endangered Species as endangered species. Mahogany wood sometimes is traded under different names. Also, some similar woods belonging to the Meliaceae family are traded as “mahogany” or as being of a “mahogany pattern”. To investigate the feasibility of the use of near infrared spectroscopy for wood discrimination, the mahogany (Swietenia macrophylla King.), andiroba or crabwood (Carapa guianensis Aubl.), cedar (Cedrela odorata L.), and curupixá (Micropholis melinoniana Pierre) woods were examined. Four discrimination models based on partial least squares-discriminant analysis were developed based on a calibration set composed of 88 samples and a test set with 44 samples. Each model corresponds to the discrimination of a wood species from the others. Optimization of the model was performed by means of the OPUS® software followed by statistical analysis software (Matlab®). The observed root mean square errors of predictions were 0.14, 0.09, 0.12, and 0.06 for discriminations of mahogany, cedar, andiroba, and curupixá, respectively. The separations of the species obtained based on the difference in the predicted values was at least 0.38. This makes it possible to perform safe discriminations with a very low probability of misclassifying a sample. This method can be considered accurate and fast.

Keywords: andiroba (Carapa guianensis); cedar (Cedrela odorata); curupixá (Micropholis melinoniana); discrimination of woods; near infrared (NIR) spectroscopy; tropical woods; true mahogany (Swietenia macrophylla)
Corresponding author. Laboratório de Produtos Florestais, Serviço Florestal Brasileiro, SCEN trecho 2, Bloco D, 70818900, Brasilia, DF, Brazil
Received: 2010-3-30
Accepted: 2010-9-2
Published Online: 2010-11-1
Published in Print: 2011-01-01

©2011 by Walter de Gruyter Berlin New York

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https://doi.org/10.1515/hf.2011.010
Keywords for this article
andiroba (Carapa guianensis); cedar (Cedrela odorata); curupixá (Micropholis melinoniana); discrimination of woods; near infrared (NIR) spectroscopy; tropical woods; true mahogany (Swietenia macrophylla)

Articles in the same Issue

  1. Publisher's Note
  2. Publisher's Note
  3. Original papers
  4. Novel paper sizing agents from renewables. Part 1: Preparation of a paper sizing agent derived from natural plant oils
  5. Novel paper sizing agents from renewables. Part 2: Characterization of maleated high oleic sunflower oil (MSOHO)
  6. Novel paper sizing agents from renewables. Part 3: Emulsion stability and hydrolysis behavior compared to conventional sizes
  7. Energy saving potential of high yield pulp (HYP) application by addition of small amounts of bleached wheat straw pulp
  8. Characterisation of Norway spruce hemicelluloses extracted by pressurised hot-water extraction (ASE) in the presence of sodium bicarbonate
  9. Fractionation and characterization of lignin-carbohydrate complexes (LCCs) from eucalyptus fibers
  10. Conditioning hardwood-derived pre-pulping extracts for use in fermentation through removal and recovery of acetic acid using trioctylphosphine oxide (TOPO)
  11. Xylitol production from olive-pruning debris by sulphuric acid hydrolysis and fermentation with Candida tropicalis
  12. Changes caused by heat treatment in chemical composition and some physical properties of acacia hybrid sapwood
  13. Near infrared spectroscopy (NIRS) as a potential tool for monitoring trade of similar woods: Discrimination of true mahogany, cedar, andiroba, and curupixá
  14. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 1: Dynamic thermomechanical properties of phenol formaldehyde resins blended with two MAPOs
  15. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 2: Influence on physical and mechanical properties
  16. Theoretical analysis of moisture transport in wood as an open porous hygroscopic material
  17. A multinuclear magnetic resonance imaging (MRI) study of wood with adsorbed water: Estimating bound water concentration and local wood density
  18. Mechanical characterization of single bamboo fibers with nanoindentation and microtensile technique
  19. Longitudinal mechanical properties of cell wall of Masson pine (Pinus massoniana Lamb) as related to moisture content: A nanoindentation study
  20. Short Note
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