In this work, magnetically excited nanoparticles were used as an inert material in a Y-type micromixer for enhancing liquid-liquid mass transfer between two immiscible fluids. Water-succinic acid-n-butanol was chosen for mass transport analyzing. Magnetic nanoparticles (MNPs) were dissolved in n-butanol as organic phase, and the MNPs were remotely excited by subjecting them into a static magnetic field. The magnetic field intensity was 1500 G. accompanied with different MNPs concentrations within 0.002-0.01 (w/v). The fluid flow patterns and quantitative analysis of mixing in two layouts, with and without MNPs, at various aqueous-to-organic volumetric flow rate ratios were compared. Three different volumetric flow rate ratios of two phases were analyzed to determine the effect of aqueous and organic flow rates on the overall mass transfer coefficient (K-La) and extraction efficiency (E). Moreover, the effect of the magnet position including next to and underneath the mixing channel was investigated. Results show that the case, which the magnet placed next to the mixing channel, was more effective for liquid-liquid mass transfer rather than other layout. At optimum concentration, 36-69% enhancement in K-La and 32-41% in E were obtained for layout with MNPs compared with plain one. (C) 2015 Elsevier B.V. All rights reserved.