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酊剂或酒剂在贮存过程中,由于包装不严及其它情况,常使其中所含一部分乙醇挥发损失,含醇量降低,经过含醇量测定后,需用高浓度醇(一般均用95％乙醇)调正至规定浓度才能再用。在中草药制剂用乙醇液提取及精制时,需不断进行蒸发浓缩,浓缩液除为水溶液外,常为不同低浓度的乙醇溶液。提取精制时,常需将此低浓度的乙醇液,加高浓度醇至所需浓度,有时一种制剂需反复进行几
Tincture or wine in the storage process, due to lax packaging and other conditions, often part of which contains a loss of ethanol volatilization, alcohol content decreased, after the determination of alcohol content, the need for high concentrations of alcohol (usually 95% Ethanol) adjusted to the required concentration to reuse. In the preparation of Chinese herbal medicine with ethanol extraction and purification, the need for continuous evaporation and concentration, in addition to concentrate aqueous solution, often different concentrations of ethanol solution. Extraction refining, often need this low concentration of ethanol, add a high concentration of alcohol to the desired concentration, and sometimes a formulation to be repeated several times