Abstract
With the increase in heat-treated rubberwood used in interior decoration materials, the odorous constituents have attracted people’s attention. In this study, a headspace solid-phase microextraction method coupled with gas chromatography–mass spectrometry was employed to analyze the odorous constituents released from heat-treated rubberwood and the gaseous components from the heat treatment process. The results showed that the odorous constituents were classed into aldehydes, esters, ketones, acids, alcohols, phenols, alkanes, aromatics, and others. During the four-month test period, the emissions of aldehydes (47.08% and 65.66%) were the most dominating compounds in VOCs emission from F180 °C and F200 °C. The changes in chemical structure of rubberwood before and after heat treatment were investigated by X-ray photoelectron spectroscopy. It was found that the O/C ratio of rubberwood decreased from 0.52 to 0.44 after heat treatment with increasing temperature; the contribution of C1 and C2 peaks is more important than C3 and C4. With increasing treatment temperature, the C1 contribution of rubberwood samples increased from 34.37 to 42.47%, whereas the C2 decreased markedly from 55.50 to 48.24% and the C3 began to decrease at higher temperature. These results corresponded to variations observed from the gas chromatographic mass spectrometry results of heat-treated rubberwood.
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Acknowledgements
The authors would like to thank Cui Chen and Yuhui Ke for the preparation of the rubberwood samples used in this study and thank Zhaojiu Wei for the modification of heat treatment equipment.
Funding
This work was supported by the Hainan Natural Science Fund for Young Scholars (grant number: 319QN321) and the Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (Grant Number: 1630022017013).
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Li, T., Li, G., Li, J. et al. HS-SPME and GC–MS for the analysis of odorous constituents from heat-treated rubberwood and the chemical change of heat-treated rubberwood by XPS analysis. Wood Sci Technol 55, 361–378 (2021). https://doi.org/10.1007/s00226-020-01253-7
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DOI: https://doi.org/10.1007/s00226-020-01253-7