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编辑同志: 转来李晶君同志的信已读过。由于我們的粗心,将“折光率方法用于药房浓溶液含量的测定”一文(载药学通报1963年9卷7期313頁)中的求氯化鈉溶液的浓度的經驗式 C=(n-1.3334)/(0.00175-7.9×10~(-6)C)漏写为C=(n-1.3334)/(0.00175-7.9×10~(-6),特此更正。关于如何利用文中公式5测定溶液浓度,现举例說明如下: 未知浓度的NaCl溶液在15℃时测得其折光率是1.3651,求該温度NaCl溶液的浓度。此处应先用該溶液折光率因数表中給出的F_0,求近似浓度。
Editor’s Comrade: The letter to Comrade Li Jingjun has been read. Due to our carelessness, the empirical formula for the concentration of sodium chloride solution in the “Determination of Concentration of Pharmacological Solutions” by the article “Refractory Pharmacology”, Bulletin of Pharmaceutical Sciences, 1963, Volume 9, Number 7, is C (n = 1.3334) / (0.00175-7.9 × 10 -6) C), we can make a correction by using the following equation: C = (n-1.3334) / (0.00175-7.9 × 10 -6) Determination of the concentration of the solution are as follows: The unknown concentration of NaCl solution measured at 15 ℃ its refractive index is 1.3651, find the temperature of the concentration of NaCl solution here should first use the solution refractive index given in the table F_0 Find the approximate concentration.