No abstract

High-throughput mini/microextractors are essential for mini/microextraction in industrial production. However, they are scarcely used in practice. This study presents a two-stage miniextractor with a focusing inlet that was fabricated by a selective dimension scale-out based on an oscillating feedback microextractor. The results indicate that the miniextractor enjoys the merits of microfluidics even at a maximum total throughput of 8.4 L/h with respect to a residence time of less than 0.15 s. Volumetric mass transfer coefficients for the miniextractor were approximately 1 or 2 orders of magnitude higher than those of conventional large-scale extractors and equal to or 1 order of magnitude higher than those of other micro/miniextractors. Furthermore, flow patterns and mass transfer characteristics in the miniextractor were experimentally investigated. The results suggest that the asymmetrical feedback channels, longer mixing chamber, and smaller angle of the exit splitter enhance extraction performance.