声光衍射法测量不同浓度NaCl溶液的密度  

Determination of Density of Sodium Chloride Solution at Different Concentrations by Acousto-Optic Diffraction

作　　者：王辉 周丽霞 周伟 陈志艳 朱宜昌 WANG Hui;ZHOU Li-xia;ZHOU Wei;CHEN Zhi-yan;ZHU Yi-chang(College of Science,China University of Petroleum(East China),Shandong Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)理学院,山东青岛266580

出　　处：《当代化工》2018年第11期2477-2480,共4页Contemporary Chemical Industry

基　　金：山东省研究生教育质量提升计划项目;项目编号:SDYY17021;中国石油大学(华东)教学研究与改革重点项目;项目编号:JY-A201818;校级大学生创新创业训练计划支持项目;项目编号:20181470

摘　　要：超声波在液体中传播会形成超声光栅。基于声光衍射技术,测量出液体的声速,结合液体的压缩系数,可计算出液体的密度。针对不同浓度的NaCl溶液,研究了声速与溶液密度的关系,提出了一种采用声光衍射技术定标测量NaCl溶液密度的新方法。验证实验表明,测量结果的最大误差小于0.7%,实验的测量结果比较准确,声光衍射测量NaCl溶液密度的新方法是可行的和可靠的。该方法也可推广用于测量其他液体的密度,具有避免测量液体压缩系数困难的优点。Ultrasonic waves propagating through liquids can form ultrasonic gratings.Based on acousto-optic diffraction technique,the velocity of sound wave in liquid are able to be measured.Moreover,the density of liquid can be calculated with the compressibility coefficient of liquid.For NaCl solutions at different concentrations,the relationship between sound velocity and solution density was studied,and a new method for measuring the density of NaCI solution by acousto-optic diffraction technique was proposed.The verification experiments showed that measurement results of NaCI solution density were accurate,and the maximum error was less than 0.7%.Therefore, the new method of measuring NaCl solution density by acousto-optic diffraction is feasible and reliable.The method can also be used to measure the density of other liquids and has the advantage of avoiding the difficulty of measuring liquid compressibility.

关 键 词：超声光栅 分光计 密度 NACL溶液 

分 类 号：TQ012[化学工程]