Characteristics of electrical field flow fractionation with chronoamperometry and electrochemical impedance

[摘要] Electrical field flow fractionation (EFFF) is a particle separation method that employs an electrical field to cause particles in the carrier flow transferring in the vertical direction. The electrical characteristics of EFFF are one of the important aspects to explore electrical field how to work on the particle separation in EFFF channel. The equivalent electrical circuit model of EFFF channel was built. The experiments of chronoamperometry and electrochemical impedance spectroscopy (EIS) were conducted on the EFFF channel. The electrical circuit was utilised to fit the data of EIS experiments on EFFF channel. The fitting data were compared with the experimental data of EIS. The result indicates that the experimental data is highly quantified with the fitting data. It manifested that the equivalent electrical circuit reflected the electrical characteristics of the EFFF channel.

[学科分类] 计算机科学（综合）

[关键词] equivalent circuits;fractionation;electric impedance measurement;electric sensing devices;electrochemical impedance spectroscopy;EFFF channel;fitting data;electrical characteristics;electrical field flow fractionation;chronoamperometry;particle separation method;carrier flow;equivalent electrical circuit model;electrochemical impedance spectroscopy