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- Title
Timber species identification from chemical fingerprints using direct analysis in real time (DART) coupled to Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS): comparison of wood samples subjected to different treatments.
- Authors
Zhang, Maomao; Zhao, Guangjie; Guo, Juan; Wiedenhoeft, Alex C.; Liu, Charles C.; Yin, Yafang
- Abstract
Timber genus identification based on the anatomical features of wood is well established in botany. However, species-level wood identification is not always possible based on traditional wood morphology techniques alone. To compensate for the deficiencies of traditional methods, direct analysis in real time coupled to Fourier transform ion cyclotron resonance mass spectrometry (DART-FTICR-MS) was used to obtain the mass spectral fingerprints of different timber species. Using heartwood samples of two morphologically similar species, Pterocarpus santalinus and Pterocarpus tinctorius, subjected to different treatments, i.e. solvent extractions and powdered samples as well as air-dried samples and samples dried at low and high temperatures, we observed distinct chemical signatures for the wood samples from the two species, enabling rapid species-level identification when multivariate statistical analysis was adopted. The supervised orthogonal partial least squares discriminant analysis (OPLS-DA) models for samples subjected to different treatments all exhibited accurate differentiation performance of the explained fraction of variance of classes (R2Y = 0.936–0.987) and the cross-validated fraction of variance of classes (Q2 = 0.857–0.949). Compared with solvent types and the physical form of the sample, the drying treatment method had a greater impact on the chemical fingerprint from DART-FTICR-MS. Air-dried wood chips were the optimal samples for the DART-FTICR-MS method coupled with statistical analysis.
- Subjects
ION cyclotron resonance spectrometry; WOOD preservatives; FOURIER transforms; MULTIVARIATE analysis; WOOD chips; WOOD
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2019, Vol 73, Issue 10, p975
- ISSN
0018-3830
- Publication type
Article
- DOI
10.1515/hf-2018-0304