Rapid authentication and identification of different types of A. roxburghii by Tri-step FT-IR spectroscopy
Keywords: Anoectochilus roxburghii; Traditional Chinese Medicines; Fourier transform infrared spectroscopy (FT-IR); Second derivative infrared spectroscopy (SD-IR); Two-dimensional correlation infrared (2D-IR); Soft Independent Modelling of Class Analogy (SIMCA);