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用不同百分浓度溶液混合配制某一浓度溶液的计算方法,常见介绍为“交叉计算法”和“T字计算法”两种。这两种方法只能解决两种不同浓度的溶液混合配制计算。而对3种以上不同浓度溶液混合配制计算频为复杂,但在制药、医院制剂工作偶有遇到。笔者根据工作实践,在“交叉计算法”的基础上,经过摸索,初步归纳出由多种百分浓度溶液混合配制所需浓度溶液的简易计算法,现举例一并叙述。1 3种不同浓度溶液配制所需浓度溶液计算法1.1 例题 1:有95％,80％,25％3种浓度的乙醇,现需要配75％浓度乙醇1250ml,问各取上述浓度乙醇多少毫升?
With different percent concentration solution to prepare a solution of certain concentration, commonly referred to as the “cross calculation method” and “T word calculation method” two. These two methods can only solve the two different concentrations of solution mixing formulation calculation. However, it is complicated to formulate and calculate the mixture of three or more different concentrations, but the pharmaceutical preparations and the hospital preparations are occasionally encountered. Based on the work practice, on the basis of “cross-calculation method”, the author tentatively summarized the simple calculation method of preparing the required concentration solution by mixing various percentage concentration solutions. 1 3 different concentrations of solution preparation of the required concentration of solution calculation method 1.1 Example 1: There are 95%, 80%, 25% of the three concentrations of ethanol, is now required with 75% concentration of ethanol 1250ml, ask each take the above concentration ethanol ml?