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13 March 2012 Quantitative measurement of a three-component mixture based on THz spectra
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Quantitative measurement based on THz absorption spectrum is of great importance in THz applications. Several researchers have worked on it and gained some achievements, but most of them explored pure component or no more than 2-component s samples. In this paper, a mixture sample consisting of Glutamine, Histidine and Threonine is investigated in the frequency range from 0.3 to 2.6 THz. The quantitative measurement principle is the Lambert-Beer's Law which have been accepted in infrared and visible spectra. Our experiments show the validation of the law in THz region. A Least-Mean-Square algorithm is adopted and measurement errors of Glutamine, Histidine and Threonine are 17.60%, 4.44% and 2.59%.
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Zhi Li, Zhaohui Zhang, Xiaoyan Zhao, Haixia Su, Fang Yan, Katherine Dunn, and Michael B. Johnston "Quantitative measurement of a three-component mixture based on THz spectra", Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 833004 (13 March 2012);

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