Comparision of contents of anthraquinones and phenolic acids compounds in different processed products from Rheum officinale by principal component analysis Determination of total saponin in Semen Platycladi and defatted powder of Semen Platycladi HPLC-ELSD for determining contents of three triterpenoidal saponins in fruits of Buddleja lindleyana from different habitats Study on determination of anthraquinones in Dachengqi Tang residues of Magnolia officinalis and Citrus aurantium removed in decoction process Comparison of sulfur fumigation processing and direct hot air heating technology on puerarin contents and efficacy of Puerariae Thomsonii Radix