近发现不少混有松香或达马胶等杂质的血竭掺伪品,可用下述理化方法鉴别。1.取血竭碎粒置白纸上,用火烘烤则熔化,渗入纸内呈黑红色,但无油迹扩散,对光透视,呈鲜艳的血红色。若掺有杂质, Recently, a number of blood-disease adulterants mixed with rosin or Da Ma Jiao were discovered and identified by the following physical and chemical methods. 1. Take blood blood crumbs and place them on a white paper, bake it with fire and melt it. It will penetrate into the paper and appear black and red, but no traces of oil will spread. It will give you a bright red blood. If doped with impurities,