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本文采用络合量法对黑龙江省的老鹳草(Geranium Wilfordii Maxim.)、鼠掌老鹳草(G.Sibiricum L.)、粗根老鹳草(G. Dahuricum DC.)、毛蕊老鹳草(G.Platyanthum duthie.)中鞣质含量进行测定，同时还测定了其乙醇浸取物的含量。结果表明：其鞣质含量和乙醇浸取物含量分别为老鹳草(3.865%，10.38%)、鼠掌老鹳草(2.924%，8.382%)、粗根老鹳草(6.639%，12.89%)、毛蕊老鹳草(7.817%，13.48%)，为制定老鹳草的质量标准提供了科学资料。
In this paper, the method of complexation was used to determine the Geranium Wilfordii Maxim., G.Sibiricum L., G. Dahuricum DC., and Murudin in Heilongjiang Province. The tannin content of grass (G.Platyanthum duthie.) was determined and the content of its ethanol extract was also determined. The results showed that the contents of tannins and ethanol extracts were geranium (3.865%, 10.38%), geranium edulis (2.924%, 8.382%), and coarsegrass (6.639%, 12.89%). ), Curcuma japonica (7.817%, 13.48%) provided scientific data for the establishment of quality standards for geranium.