Related Experiment Video
Updated: Jun 26, 2026

Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
Evaluation of a microfluidic device for the electrochemical determination of halide content in ionic liquids
1QUILL Research Centre, School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
Abstract:
A microfluidic device designed for electrochemical studies on a microliter scale has been utilized for the examination of impurity levels in ionic liquids (ILs). Halide impurities are common following IL synthesis, and this study demonstrates the ability to quantify low concentrations of halide in a range of ILs to levels of approximately 5 ppm, even in ILs not currently measurable using other methods such as ion chromatography. To validate the mixer device, the electrochemistry of ferrocene was also examined and compared with spectroscopic and bulk electrochemistry measurements. An automated "sample preparation, delivery, and calibration" method was developed, and the chip successfully used for linear sweep, cyclic voltammetry (under both quiescent and steady-state flowing conditions), square wave voltammetry, and differential pulse voltammetry. An effective method of electrochemically cleaning the electrodes is also presented.
Related Concept Videos
Ion-Exchange Chromatography
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Interfacial Electrochemical Methods: Overview
Transport Number
Electrochemical Systems
Potentiometry: Membrane Electrodes

