基于分子光谱的翡翠不同产地快速鉴别研究  

Rapid Discrimination of Jade Origins Based on Molecular Spectra

作　　者：雷蕾 滕亚君 刘汗青 祖恩东[1] Lei Lei;Teng Yajun;Liu Hanqing;Zu Endong(China Faculty of Material Science and Engineer,Kunming University of Science and Technology,Kunming,Yunnan650093,China;Kunming Customs Technology Center,Kunming,Yunnan650228,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明海关技术中心,云南昆明650228

出　　处：《激光与光电子学进展》2021年第12期500-505,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2018YFF0215400)。

摘　　要：以缅甸、俄罗斯、危地马拉翡翠为研究对象,利用分子光谱对三个产地翡翠的光谱特征进行了对比分析。以红外光谱和激光拉曼光谱为基础,结合主成分分析((Principal Component Analysis,PCA)和反向(Back Propagation,BP)神经网络,建立了产地判别模型,并对其判别效果进行了检验。结果表明:不同产地翡翠的红外吸收光谱基本一致,拉曼光谱呈现一定差异,缅甸、危地马拉和俄罗斯翡翠均具有特征拉曼光谱。利用基于红外光谱的PCA-BP神经网络判别模型鉴别训练样品和检验样品,准确率分别为94.2%和91.6%;利用基于激光拉曼光谱的PCA-BP神经网络判别模型鉴别训练样品和检验样品,准确率分别为93.48%和100.0%。由此可知,基于红外光谱和拉曼光谱的PCA-BP神经网络判别模型对翡翠产地的鉴别准确率均较高,表明其在翡翠产地快速鉴别方面具有一定的实用性和可行性。The spectral characteristics of jades from Burma,Russia,and Guatemala are compared and analyzed.Based on the infrared spectroscopy and Raman spectroscopy combined with the principal component analysis(PCA)and the back propagation(BP)neural network,the model is built for discriminating jade origins,whose discrimination effect is tested.The results show that the infrared absorption spectra of jades from different origins are basically similar,but there exists certain difference in their Raman spectra.In addition,Jades from Burma,Guatemala,and Russia all possess the characteristic Raman spectra.Based on the PCA-BP neural network discrimination model of infrared spectra,the discrimination accuracies of training samples and test samples are94.2%and 91.6%,respectively.In contrast,based on the PCA-BP neural network discrimination model of Raman spectra,the discrimination accuracies are 93.48%and 100.0%,respectively.It can be seen that the PCA-BP neural network discrimination models based on infrared spectra and Raman spectra both have high accuracy in identifying jade origins,indicating they have certain practicability and feasibility for rapid identification of jade origins.

关 键 词：光谱学 红外光谱 拉曼光谱 翡翠 产地 BP神经网络 

分 类 号：TN219[电子电信—物理电子学] TN249