Title :
Identification of substances by THz spectroscopy and multivariate analysis
Author :
Pohl, A. ; Desmann, N. ; Dutzi, K. ; Hubers, Heinz-Wilhelm
Author_Institution :
Inst. fur Opt. und atomare Phys., Tech. Univ. Berlin, Berlin, Germany
Abstract :
The identification of different substances based on terahertz transmittance spectra and multivariate analysis (MVA) is demonstrated. Transmittance spectra are obtained by the use of a Fourier transform infrared spectrometer (FTIR). By means of principal component analysis (PCA) and partial least squares regression (PLS) the spectral data were analyzed in order to discriminate and to identify the substances from each other.
Keywords :
Fourier transform spectra; infrared spectra; least squares approximations; principal component analysis; terahertz wave spectra; FTIR; Fourier transform infrared spectrometer; PCA; PLS; multivariate analysis; partial least squares regression; principal component analysis; terahertz transmittance spectra; Drugs; Explosives; Imaging; Principal component analysis; Sensors; Spectroscopy; Sugar;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956050
