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Free‐flow isoelectric focusing (FFIEF) has the merits of mild separation conditions, high recovery and resolution, but suffers from the issues of ampholytes interference and high cost due to expensive carrier ampholytes. In this paper, a home‐made carrier ampholyte‐free FFIEF system was constructed via orientated migration of H+ and OH− provided by electrode solutions. When applying an electric field,...
Columns switch recycling size exclusion chromatography (csrSEC) was proposed to achieve high resolution protein separation with good biocompatibility. Proteins were firstly separated by two serially coupled SEC columns, and fractions were in sequence switched back to the first column by two-position valves for further separation in terms of close-loop recycling until satisfactory resolution was achieved...
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