Applications of Photoelectron Spectroscopy to Analytical Chemistry

Cheng, K. L.; Prather, John W.; Carlson, Thomas A.

doi:10.1080/10408347508542680

Cited by 2 publications

(1 citation statement)

References 134 publications

(66 reference statements)

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“…Fourier transform infrared spectroscopy method is a very common analysis tool with high sensitivity, resolution and fast speed, which has been widely used in the identification of Chinese traditional medicinal materials [1][2][3]. Because the traditional Chinese medicinal material is a kind of compound, the directly measured infrared spectrum is the superposition of all the infrared spectrums.…”

Section: Introductionmentioning

confidence: 99%

Identification betweenStephania tetrandraS. Moore andStephania cepharanthaHayata by CWT–FTIR–RBFNN

Zhang

Cheng

2008

Spectroscopy

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Horizontal attenuation total reflection-Fourier transform infrared spectroscopy (HATR-FTIR) is used to measure the FTIR of Stephania tetrandra S. Moore and Stephania cepharantha Hayata. Because they belong to the same family and the same genus Chinese traditional medicinal materials, their chemical components are very similar. In order to extrude the difference between Stephania tetrandra S. Moore and Stephania cepharantha Hayata, continuous wavelet transform (CWT) is used to decompose the FTIR of Stephania tetrandra S. Moore and Stephania cepharantha Hayata. Three main scales are selected as the feature extracting space in the CWT domain. According the distribution of FTIR of Stephania tetrandra S. Moore and Stephania cepharantha Hayata, three feature regions are determined at every spectra band at selected three scales in the CWT domain. Thus nine feature parameters form the feature vector. The feature vector is input to the radius basis function neural network (RBFNN) to train so as to accurately classify the Stephania tetrandra S. Moore and Stephania cepharantha Hayata. 128 couples of FTIR are used to train and test the proposed method, where 78 couples of data are used as training samples and 50 couples of data are used as testing samples. Experimental results show that the accurate recognition rate between Stephania tetrandra S. Moore and Stephania cepharantha Hayata is respectively 99.8 and 99.9% by using the proposed method.

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Section: Introductionmentioning

confidence: 99%