红木的近红外光谱分析

红木珍贵、种类多,大多数人对红木种类及真伪难以或无法鉴别。利用近红外光谱技术对国家标准中八类红木的近红外光谱进行分析,研究结果表明:(1)近红外光谱与红木色度学参数(L*,a*和b*)之间存在非常高的相关性,预测值与实测红木L*,a*和b*值的相关性分别达到0.988,0.991和0.993;(2)利用化学计量学中的主成分分析(PCA)方法可以将八类红木清楚地区分成八个相应的类别,利用三个主成份信息绘制的三维PCA得分图比二维图更能直观地展现八类红木的区别。研究结果说明应用近红外光谱技术识别红木类别具有可行性,这为开发红木的鉴定或识别提供新的方法和研究思路。

Investigation of Near Infrared Spectroscopy of Rosewood

Rosewood is a kind of precious wood which include many wood species.It’s difficult to most people to identify rosewood species.Near infrared spectroscopy(NIR) of eight rosewood species was investigated in the present paper.The results showed that(1) there was significant correlation between near infrared spectroscopy and color parameters expressed by L*,a* and b* values of rosewood,the correlation coefficients between NIR predicted and laboratory measured L*,a* and b* values were 0.988,0.991 and 0.993,respectively;(2) The eight rosewood samples can be distinctly divided into eight categories by principal component analysis(PCA),the differences in the NIR among the eight rosewood species were more distinctly revealed by the three-dimensional PCA score plot than that of the two-dimensional.The results illustrated that it was feasible to identify rosewood species by near infrared spectroscopy coupled with chemometrics,and also provided a new method to rapidly identify or classify rosewood.