Acta Optica Sinica, Volume. 36, Issue 12, 1230001(2016)
Nondestructive Discrimination of Shoushan Stone and Laos Stone Based on Raman Spectroscopy and Multivariate Methods
The Raman spectra of 35 stone samples (13 Shoushan stones and 22 Laos stones) are measured by a self-developed portable Raman spectrometer Hx-Spec, which is excited by a 785 nm diode laser and the spectrum range is 200-2700 cm-1 with a resolution of 6 cm-1. A multioariate model is established by combining the principal component analysis (PCA) and the linear discriminant analysis (LDA), a discrimination sensitivity of 86.7% and a specificity of 100% are achieved in separating Laos stone from Shoushan stone, while the performance of corresponding receiver operating characteristic (ROC) curve is 0.977. Besides, a discriminant accuracy achieves 87.5% after 8 new samples are added as a validation. These results demonstrate that the utility of portable Raman spectrometer combined with chemometrics provides a new strategy to discriminate the Shoushan and Laos stones.
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Li Xia, Huang Meizhen, Song Biao, Zou Ye, Chen Jie, Wang Yang. Nondestructive Discrimination of Shoushan Stone and Laos Stone Based on Raman Spectroscopy and Multivariate Methods[J]. Acta Optica Sinica, 2016, 36(12): 1230001
Category: Spectroscopy
Received: Jul. 4, 2016
Accepted: --
Published Online: Dec. 14, 2016
The Author Email: Xia Li (lixia00@sjtu.edu.cn)