L-抗坏血酸水溶液扩散系数的全息干涉法测量  

Diffusivity Measurement of L-ascorbic Acid Aqueous Solution Using Holographic Interferometry

作　　者：朱春英[1] 何明霞[2] 赵长伟[3] 马友光[1] 刘常杰[2] 马沛生[3] 

机构地区：[1]天津大学化学工程联合国家重点实验室,天津300072 [2]天津大学精仪学院,天津300072 [3]天津大学化工学院,天津300072

出　　处：《光电子．激光》2003年第10期1066-1069,共4页Journal of Optoelectronics·Laser

基　　金：教育部博士点基金资助项目(2000005608)

摘　　要：设计并建立了一套用于液相扩散系数测定的激光实时全息干涉及液相扩散模拟系统。测定了25℃0.33mol/LKCl水溶液的扩散系数,结果与文献值非常接近,证明了仪器的准确性。进而利用该装置测定了不同浓度(0.0100、0.0287、0.0542、0.0822、0.1007mol/L)的L 抗坏血酸水溶液的扩散系数,得到了不同浓度L 抗坏血酸水溶液在不同位置的扩散系数以及每一浓度的平均扩散系数为13.5552、12.5230、11.4577、10.5606、10.0148×10-6cm2/s。A realtime holographic interferometer and a simulator for liquidliquid diffusion were specially designed and constructed in order to measure liquid diffusivity in transparent fluids.As comparing the diffusivities of 0.33 mol/L KCl aqueous solution at temperature 25 ℃ were determined experimentally to verify the accuracy and reliability of the instrument,the determined results are at good agreement with ones in literature and validate the experimental setup.Furthermore,the diffusion coefficients of Lascorbic acid at 25 ℃ and under 5 various concentrations (0.010 0?0.028 7?0.054 2?0.082 2?0.100 7 mol/L) and different positions were measured respectively,and worked out average diffusion coefficients of 5 various concentrations:13.555 2,12.523 0,11.457 7,10.560 6,10.014 8×10-6 cm2/s.

关 键 词：液相扩散系数 全息干涉仪 L-抗坏血酸水溶液 液液传质 

分 类 号：TQ021.4[化学工程]