药材浸渍时因吸液而引起的成分损失,是浸渍法的一个缺点。在不增加溶媒情况下,使成分的损失减少到最低量,人们多采用分次浸渍法。现将多次浸出后成分损失量的计算公式推导如下,并比较一次浸渍与多次浸渍的浸渍效果。设浸出达扩散平衡后,药渣所吸收的液体与浸出,液的浓度相同,则 (?) (1) 式中x为药材成分的总浸出量,a为药渣所吸 The loss of components due to the absorption of liquids during the impregnation of medicinal herbs is a disadvantage of the impregnation method. Without increasing the amount of solvent, the loss of components is reduced to the minimum amount, and people often use fractional impregnation. The calculation formula for the amount of component loss after multiple leaching is now deduced as follows, and the immersion effects of one impregnation and multiple impregnations are compared. After the leaching reaches the diffusion equilibrium, the liquid absorbed by the dreg is the same as the leaching liquid, then (?) (1) where x is the total leaching amount of the medicinal ingredients and a is the dreg