Rapid and simultaneous analysis of five alkaloids in four parts of Coptidis Rhizoma by near-infrared spectroscopy - Jintao, X; Yufei, L; Liming, Y; Chunyan, L; Quanwei, Y; Weiying, W; Yun, J; Minxiang, Z; Peng, L (Spectrochim Acta A, 2018)