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[A new method for quick identification for fufang danshen tablets by AOTF-near infrared spectroscopy]

Nin Wang1, Shao-song Cai, Wei-hong Wu

  • 1Shandong High Training School, Jinan 250002, China. sdwxwn@163.com

Zhongguo Zhong Yao Za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica
|December 18, 2008
PubMed
Abstract

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
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