HUANG Guiqiong^a，QIU Jian^a，b，HAN Peng^a，b，PENG Li^a，b，LIU Dongmei^a，b，LUO Kaiqing^a，b

(a. School of Physics & Telecommunication Engineering, b. Guangdong Provincial Engineering Research Center for Optoelectronic Instrument, South China Normal University, Guangzhou 510006, China)

Abstract: The influence of electrophoretic electric field in Zeta potential measurement is theoretically analyzed, and the electric field simulation experiment was carried out on the mainstream U-type sample cell. It was found that the distribution of electric field intensity at the bottom is not uniform. In order to improve its accuracy and precision, the left arm and right arm of the sample cell were defined as the experimental measurement area. In the experiment, the range of electrophoresis voltage was increased from 20 V to 60 V. The results show that when the measurement point is selected in the left arm and right arm in the U-type sample cell, the Doppler shifts increase linearly. And the linear correlation coefficient R2 are all more than 0.99 in different electrophoresis voltage, higher than that at the bottom.

Keywords: Zeta potential; electrophoretic light scattering; electric field stability; vertical arm measurement on both sides

中图分类号：O436.1                              文献标志码：A

文章编号：1008-5548(2019)04-0026-07

DOI:10.13732/j.issn.1008-5548.2019.04.004

收稿日期： 2019-01-25，修回日期：2019-03-06，在线出版时间：2019-04-29 14:00。

基金项目：国家自然科学基金项目，编号：61371176；广东省自然科学基金项目，编号：2014A030313433； 广东省科技计划项目，编号：2013B060100014；广州市科技计划项目，编号：201707010485，201704020137。

第一作者简介：黄桂琼(1993—)，女，硕士研究生，研究方向为光电技术与系统。E-mail：1150232102@qq.com。

通信作者简介：

邱健(1975—)，男，博士，副教授，硕士生导师，研究方向为光电技术与系统。E-mail：qiuj@scnu.edu.cn。

韩鹏(1976—)，男，博士，教授，博士生导师，研究方向为光电技术与系统。E-mail：hanp@scnu.edu.cn。