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Microfluidic extraction based on a co-laminar flow of aqueous two-phase system is used to separate bovine serum albumin (BSA). Mass transfer between the continuous two-phase flows is demonstrated by the extraction of BSA in a microfluidic device. The protein concentrations of the BSA samples were determined using the Bradford method. Polyethylene glycol 4000 and ammonium sulfate ((NH4)2SO4) served...
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