Membrane-based preconcentration device

Figure 5.7 Layout and dimensions of a membrane-based preconcentration device, (a) Filter-CE unit, (b) concentrator-CE device, (c) dimension of microchannel, and (d) out look of concentrator-CE device [83].

Li, Y., Membrane-based protein preconcentration microfluidic devices, M.S. Thesis, Brigham Young University, 2006. 

Several research groups have reported ways to preconcentrate samples in Lab-on-a-Chip devices. While most on-chip preconcentration approaches evolve from conventional capillary electrophoresis and chromatographic column techniques, these preconcentration techniques play an increasingly important role in chip-based system. The basic preconcentration strategies applied on microfluidic devices can be classified into three large categories electrokinetic preconcentration, chromatographic preconcentration and membrane preconcentration. 

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