Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.
Fujian Inspection and Research Institute for Product Quality, Fuzhou 350001, China.
Molecules. 2022 Jul 27;27(15):4793. doi: 10.3390/molecules27154793.
In order to explore a rapid identification method for the anti-counterfeit of commercial high value collections, a three-step infrared spectrum method was used for the pterocarpus collection identification to confirm whether a commercial pterocarpus bracelet (PB) was made from the precious species of . In the first step, undertaken by Fourier transform infrared spectroscopy (FTIR) spectrum, the absorption peaks intensity of PB was slightly higher than that of only at 1594 cm, 1205 cm, 1155 cm and 836 cm. In the next step of second derivative IR spectra (SDIR), the FTIR features of the tested samples were further amplified, and the peaks at 1600 cm, 1171 cm and 1152 cm become clearly defined in PB. Finally, by means of two-dimensional correlation infrared (2DIR) spectrum, it revealed that the response of holocellulose to thermal perturbation was stronger in than that in PB mainly at 977 cm, 1008 cm, 1100 cm, 1057 cm, 1190 cm and 1214 cm, while the aromatic functional groups of PB were much more sensitive to the thermal perturbation than those of mainly at 1456 cm, 1467 cm, 1518 cm, 1558 cm, 1576 cm and 1605 cm. In addition, fluorescence microscopy was used to verify the effectiveness of the above method for wood identification and the results showed good consistency. This study demonstrated that the three-step IR method could provide a rapid and effective way for the anti-counterfeit of pterocarpus collections.
为探索商用高价值收藏品的快速防伪鉴别方法，采用三步法红外光谱对紫檀属木材进行鉴别，以确定商用紫檀手串（PB）是否由珍贵的紫檀属树种制成。在第一步傅里叶变换红外光谱（FTIR）谱中，PB 的吸收峰强度仅在 1594cm、1205cm、1155cm 和 836cm 处略高于 。在第二步二阶导数红外光谱（SDIR）中，进一步放大了测试样品的 FTIR 特征，在 PB 中，1600cm、1171cm 和 1152cm 处的峰变得清晰可辨。最后，通过二维相关红外光谱（2DIR），揭示了热扰动下全纤维素对热扰动的响应在 中比在 PB 中更强，主要在 977cm、1008cm、1100cm、1057cm、1190cm 和 1214cm 处，而 PB 的芳香官能团对热扰动的敏感性比 中的强，主要在 1456cm、1467cm、1518cm、1558cm、1576cm 和 1605cm 处。此外，荧光显微镜用于验证上述木材鉴别方法的有效性，结果表明具有良好的一致性。本研究表明，三步法 IR 可快速有效鉴别紫檀属木材。
