Numerical simulation of continuous extraction of highly concentrated Li+ from high Mg2+/Li+ ratio brines in an ion concentration polarization-based microfluidic system

Simulation and Experimental Study of Ion Concentration Polarization Induced Electroconvective Vortex and Particle Movement

“…EF Fixed volumetric charge [30] Fixed volumetric charge [31] Fixed surface charge and electric potential [32,33] EF/HF Fixed surface charge [22] Fixed volumetric charge [34] Fixed surface charge and fixed electric potential [35] ICP-2C EF Fixed volumetric charge [31] EF/HF Fixed surface charge This work…”

Droplet encapsulation of electrokinetically-focused analytes without loss of resolution

“…5,17,[21][22][23][24][25][26][27][28][29][30] We refer the reader to a short theoretical background of ICPF in the ESI † in order to define the requirements of the droplet generator. For a deeper theoretical background of ICPF the reader is referred to our previous work 1 or the work of Ouyang et al 31 and the more recent work of Gong et al 6,7 There are two operating modes in ICPF namely peak and plateau mode. In peak mode analytes that are in low concentration compared to the bulk electrolyte will form a Gaussian peak when they concentrate by ICPF.…”

“…The extraction of analytes electrokinetically focused via ion concentration polarization focusing (ICPF) has been reported before by our group 1,2 and a number of other researchers. [3][4][5][6][7][8] Continuous extraction methods such as our previous work and the work 2 of Kwak et al 5 suffer from low preconcentration rates. On the other hand in non-continuous methods, after extraction a significant decrease in concentration and separation resolution inevitably occurs due to diffusion.…”

Continuous focusing, fractionation and extraction of anionic analytes in a microfluidic chip

“…For a more extensive theoretical description of ICPF the reader is referred to the recent report by Ouyang et al 11 In addition the feasibility of extraction of concentrated (cationic) analytes via ICPF was reported via numerical simulations of similar systems. 12,13 ICPF is based on differential ionic migration in an electric field gradient. The electrical field gradient is created by applying a steady potential difference over a microchannel which contains a region in the axial direction with a salt concentration gradient.…”