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A Portable Spectrum Measurement System Based on Laser-Raman and Fluoresce Spectrum for Cooking Oil Analysis

Advanced Materials Research, 2012
A system based on spectrum analysis for cooking oil testing which combining laser-induced-fluorescence and laser-Raman technology is established. Several oil samples are testing by this system. The measurement results show that, there are rich information for fluorescence and Raman spectrum for the oil samples and there are obvious difference between ...
Wei Wei Feng, Wei Zhang, Xiao Xue Tian, Hai Long Peng, Hua Xiong, Ling Xin Chen   +5 more
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Normal mode and experimental analysis of TNT Raman spectrum

Journal of Molecular Structure, 2017
Abstract In this study, a Raman spectrum of TNT was characterized through experiments and simulated using 22 hybrid density functional theory (DFT) methods. Among the different hybrid DFT methods, it was found that the most accurate simulation results of the Raman shift frequency were calculated by the O3LYP method.
Yucheng Liu, Yuemin Liu
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Analysis of the Raman spectrum of SF6

Journal of Molecular Spectroscopy, 1979
Abstract The Raman active fundamentals ν1(A1g), ν2(Eg), ν5(F2g), and the overtone 2ν6 of SF6 have been investigated with a higher resolution and the band origins were estimated to be: ν1 = 774.53 cm−1, ν2 = 643.35 cm−1, ν5 = 523.5 cm−1, and 2ν6 = 693.8 cm−1. Raman and infrared data have been combined for estimation of several anharmonicity constants.
A Aboumajd, H Berger, R Saint-Loup
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CWT-PLSR for quantitative analysis of Raman spectrum

2012 IEEE International Conference on Bioinformatics and Biomedicine, 2012
Quantitative analysis of Raman spectra using Surface Enhanced Raman scattering (SERS) nanoparticles has shown the potential and promising trend of development in vivo molecular imaging. Partial Least Square Regression (PLSR) methods are the state-of-the-art methods.
Shuo Li 0009, James O. Nyagilo, Digant P. Dave, Jean Gao   +3 more
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Raman spectrum calculation and analysis of glyphosate

2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), 2012
Glyphosate is an efficient, low toxicity, non-selective post-emergence herbicide. In this work, Glyphosate molecular structure was optimized by Hartree-Fock(HF) approximation method. Glyphosate molecular Raman and infrared spectra was calculated based on HF/6–31G sets and DFT/6–31G sets, then two theoretical Raman spectra were carefully compared with ...
Meihui Jin, Wanying Song, Yang Liu, Moran Guo, Yong Tan, Liwei Liu, Changli Li, Xihe Zhang, Zhenfang Ma, Hong-xing Cai   +9 more
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Raman spectrum calculation and analysis of Xylitol

2012 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), 2012
Xylitol is an important substitute of sugar, it was widely used in medicine, chemical and food manufacture. In this work, xylitol geometry structure was optimized by density functional theory (DFT) method. Raman spectra was calculated based on Hartree-Fock (HF)/6–31G sets and DFT/6–31G sets, good agreements were obtained between the two theoretical and
Guo Moran, Cai Hongxing, Liu Liwei, Zhang Yue, Shi Jing, Hu Xinyue, Ma Zhenfang, Zhang Xihe   +7 more
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The Raman spectrum and analysis of phonon modes in sodalite

Journal of Physics C: Solid State Physics, 1981
Polarised Raman spectra of chloro- and bromo-sodalite (Na4Al3(SiO4)3Br)2 single crystals have been recorded, and 28 of the predicted 32 Raman-active phonon modes observed. A full group-theoretical analysis of the zone-centre phonons is given. The internal modes are assigned using as a basis the normal mode frequencies of the XO4 complex (X=Si or Al). A
J Ariai, S R P Smith
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Raman spectrum calculation and analysis of p-xylene

2014 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), 2014
P-xylene is one of the main harmful ingredients of illegal cooking oil. This paper indicates the spatial structure of p-xylene, and the structure is optimized through density functional theory (DFT) method. Then we calculate its vibration characteristic by using Hartree-Fock (HF) and DFT separately based on 6-31G and show the spectral and infrared ...
Jing Shi, Xinhui Miao, Yu Liu, Yong Tan, Mingshan Zhang, Hongxing Cai   +5 more
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A New Continuum Regression Method for Quantitative Analysis of Raman Spectrum

2012 11th International Conference on Machine Learning and Applications, 2012
Quantitative analysis of Raman spectrum using Surface Enhanced Raman scattering (SERS) nanoparticles has shown the potential and promising trend of development in vivo molecular imaging. Because of the high dimension of Raman spectra and limited number of samples, latent variable regression methods, e.g.
Shuo Li 0009, Jean Gao, James O. Nyagilo, Digant P. Dave   +3 more
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Polarization analysis of the Raman spectrum of As2S3 crystals

Solid State Communications, 1979
Abstract We present the first complete series of polarized Raman spectra of orpiment crystals and the corresponding possible symmetry assignments of the phonon peaks within the layer model structure. We observe new peaks and a low frequency mode which could be a rigid layer vibration.
RAZZETTI C., LOTTICI, Pier Paolo
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