Research on Rapid and Non-Destructive Identification of Aging Wheat Based on ATR-Terahertz Spectroscopy Combined with PLS-DA
WANG Dong1, 2, PAN Li-gang1, 2, LIU Long-hai3, JIANG Justin3, LI An1, 2, JIN Xin-xin1, 2, MA Zhi-hong1, 2, WANG Ji-hua1, 2*
1. Beijing Research Center for Agricultural Standards and Testing, Beijing 100097, China 2. Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China 3. Advantest (China) Co. Ltd., Shanghai 201203, China
Abstract：In this research, the terahertz spectra data of the aging wheat processed under manual control environment by ATR accessory were collected. After the data diversity based on the composite score by PCA, the non-destructive identification models of aging wheat were developed by PLS-DA algorithm. The results showed that for the absorption coefficient spectrum, the accuracy of the experimental group, control group of the calibration set and cross validation set were 84.2%, 94.7%, 84.2% and 81.6% respectively, while the accuracy of the experimental group and control group of the external validation set were 73.7% and 100.0% respectively; for the refractive index spectrum, the accuracy of the experimental group, control group of the calibration set and cross validation set were 84.2%, 92.0%, 76.3% and 76.3% respectively, while the accuracy of the experimental group and control group of the external validation set were 84.2% and 89.5% respectively. The research indicates that ATR-THz technology should be of great potentials in the application in the non-destructive identification of aging wheat.
Key words：Terahertz spectroscopy;Attenuated total reflection;Wheat;Composite score;Discriminant analysis
王 冬1, 2，潘立刚1, 2，刘龙海3，江元卿3，李 安1, 2，靳欣欣1, 2，马智宏1, 2，王纪华1, 2* . ATR-THz波谱结合PLS-DA对陈化小麦快速无损鉴别研究 [J]. 光谱学与光谱分析, 2016, 36(07): 2036-2041.
WANG Dong1, 2, PAN Li-gang1, 2, LIU Long-hai3, JIANG Justin3, LI An1, 2, JIN Xin-xin1, 2, MA Zhi-hong1, 2, WANG Ji-hua1, 2*. Research on Rapid and Non-Destructive Identification of Aging Wheat Based on ATR-Terahertz Spectroscopy Combined with PLS-DA . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(07): 2036-2041.
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