ZHONG, R.X., et al. “Online Detection for Notoginseng Ingredients in Macroporous Resin Purification Process Using Near Infrared Technology in Combination With Partial Least Squares&Nbsp”;. Asian Journal of Chemistry, vol. 26, no. 3, Feb. 2014, pp. 921-5, doi:10.14233/ajchem.2014.16313.