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为确保用药安全、有效,药房自制制剂均须作含量测定。由于要求快速,一般在计算含量时仅做上、下限或将各种制剂事先计算好,做成含量表待查。现设计一种计算尺,只要每次所取检品量及测定方法不变,无论是用容量分析法、折光法或分光光度法测定含量均可在尺上直接读出该检品所含成分的百分含量及百分标示量。一、计算尺的原理利用对数将加减代替乘除。如制1到10的
In order to ensure the safety and effectiveness of medicines, the pharmacy-made preparations must be tested for their contents. As the requirements of fast, usually only in the calculation of the content of the upper and lower limits or a variety of formulations calculated in advance, made of content to be investigated. Is to design a slide rule, as long as the amount of each taken and measurement methods unchanged, either by volume analysis, refractive index or spectrophotometric determination of the content can be read directly on the ruler of the ingredients Percentage and percentage markings. First, the principle of slide rule The use of logarithm will be added instead of multiplication and division. Such as the system 1 to 10’s