Discrimination of the Coptis chinensis geographic origins with surface enhanced Raman scattering spectroscopy. - He, Shixuan; Liu, Xiaohong; Zhang, Wei; Xie, Wanyi; Zhang, Hua; Fu, Weiling; Liu, Hong; Liu, Xiaoling; Xu, Yuanjian; Yang, Dajian; Gao, Yimeng (Chemometrics & Intelligent Laboratory Systems, 2015)