超声光栅测量溶液中超声声速与浓度关系研究  

Study on relationship between sound velocity of ultrasonic wave and solution concentration measured by ultrasonic diffraction

作　　者：杨燕婷[1] 王敏[1] 周莹[1] 周述苍[1] 

机构地区：[1]广东工业大学实验教学部,广东广州510006

出　　处：《实验技术与管理》2011年第7期32-35,共4页Experimental Technology and Management

摘　　要：在室温条件下,对不同浓度的食盐(NaCl)和蔗糖(C12H22O11)溶液在超声光栅中形成的光栅光谱进行测量,并运用线性回归方法详细研究了超声波声速与溶液浓度的关系。两种溶液中的测量数据显示,在溶液达到饱和前超声波声速随溶液浓度的增加单调递增,显现出良好的线性关系;达到饱和后超声波声速则为常数。线性拟合表明,两种溶液中声速相对浓度的线性关系成立的置信概率都很高。从影响超声波传播速度最主要的因素——分子或离子浓度分析解释了NaCl溶液中,线性关系更为完美、溶液浓度的改变对超声波声速的影响也更加剧烈的原因。At room temperature,the concentrations of different qualities of salt（NaCl） and sucrose（C12H22O11） solution in the form of ultrasonic grating measuring spectrum are measured,and by using the linear regression method the relationship between velocity of ultrasonic wave and solution concentration is studied in detail.Two kinds of measurement data shows that before solution of saturation,ultrasonic wave solution concentration increases with increasing drab,show good linear relationship,and after reaching saturation,the velocity of ultrasonic wave is constant.Through the linear fitting,the two kinds of solution of linear programming relative concentration velocity equation,linear relationship between the high probabilities was credible.From the influence of ultrasonic velocity main factors-molecules or ions concentration analysis explained in two solution of NaCl,the linear relation is perfect,the solution concentration changes on the influence of ultrasonic velocity are more intense.

关 键 词：超声光栅 声速 液体浓度 饱和 

分 类 号：O657.5[理学—分析化学]