7Young HC,Young W C,Strategies for supercritical fluid extraction of hyoscyamine and scopolamine salts using basified modifies[J].JouYnal of Chromatogra phyA.1999,863(1):47-55.
9Jaoicat JL,Caude M,Rosset R,et al.Extraction of major alkaloids from poppy straw with near-critical ixtures of carbon dioxide polar modifiers[J].J Chromatogr,1990,505(1):247-256.