测量液体浓度的一种新方法  

A New Method for Measuring Liquid Concentration

作　　者：余功奇 方路线[1] Yu Gongqi;Fang Luxian(The College of Post and Telecommunication of Wuhan Institute of Technology,Wuhan Hubei 430073)

机构地区：[1]武汉工程大学邮电与信息工程学院,湖北武汉430073

出　　处：《中国仪器仪表》2025年第4期31-35,共5页China Instrumentation

摘　　要：本文提出了一种测量液体浓度的新方法,即分离还原法。利用比重计标示待测溶液浓度的变化,通过先后向待测溶液中加入少量溶质和溶剂,使比重计示数经过变化后又回到初始值,溶液浓度经过先增后减,也还原为原值。根据加入的溶质质量和溶剂质量,计算得到待测溶液的浓度。利用该方法,对配制的标准盐水溶液的质量百分比浓度和质量-体积浓度,进行了测量。测量结果表明,测量值与标准值比较,偏差较小,测量精度较高。同时,对测量不确定度和实验误差进行计算和分析。A new method for measuring the concentration of liquid,namely separation reduction method,is proposed.The Hydrometer is used to mark the change of the concentration of the solution to be measured.By successively adding a small amount of solute and solvent to the solution to be measured,the Hydrometer reading returns to the initial value after changing,and the solution concentration also returns to the original value after first increasing and then decreasing.Calculate the concentration of the solution to be tested based on the mass of the added solute and solvent.Using this method,the mass percentage concentration and mass volume concentration of the prepared standard saline solution were measured.The measurement results indicate that the deviation between the measured value and the standard value is small,and the measurement accuracy is high.The Measurement uncertainty and experimental error are calculated and analyzed.

关 键 词：比重计 分离还原法 液体质量百分比浓度 质量-体积浓度 

分 类 号：O6-33[理学—化学]