大学化学2024，Vol.39Issue(5)：345-353,9.DOI:10.3866/PKU.DXHX202312009
电泳法测量胶体ζ电势的实验方法探究和仪器创新
Method Exploration and Instrument Innovation for the Experiment of Colloid ζ Potential Measurement by Electrophoresis
摘要
Abstract
In the physical chemistry experiment"Colloid ζ potential measurement by electrophoresis",there exist some issues affecting the effectiveness of experimental teaching,such as prolonged colloid purification time and low accuracy in interface position measurement.To address these challenges,this paper explores methods and conditions for the rapid,large-scale,and repeatable purification of Fe(OH)3 colloids using acid and alkali ion exchange resins.Additionally,an innovative device utilizing a digital scale and a light barrier for precise measurement of colloidal interface position has been designed.This device is integrated with the electrophoresis tube holder,forming a dedicated set of instrumentation.The increased accuracy in interface position measurement allows for a reduction in electrophoresis measurement time to 5 minutes,mitigating the impact of potential gradient changes caused by prolonged electrophoresis.The application of these improved methods and instruments in experimental teaching has resulted in enhanced efficiency,reduced measurement result deviation,and improved repeatability.This lays the groundwork for incorporating some exploratory experiments into the teaching program.关键词
ζ电势/电泳/氢氧化铁胶体/离子交换/仪器创新Key words
ζ Potential/Electrophoresis/Ferric hydroxide colloid/Ion exchange/Instrument innovation分类
社会科学引用本文复制引用
梁峰,李得胜,蒋玉婷,董家新,刘冬成,沈星灿..电泳法测量胶体ζ电势的实验方法探究和仪器创新[J].大学化学,2024,39(5):345-353,9.基金项目
广西高等教育本科教学改革工程项目(2021JGB132,2023JGB109) （2021JGB132,2023JGB109）
化学国家一流专业建设点 （）
广西高等教育本科教学改革工程重点项目(2023JGZ108) （2023JGZ108）
