An integrated microfluidic biochemical detection system with magnetic bead-based sampling and analysis capabilities

This paper presents the development and characterization of an integrated microfluidic biochemical detection system for fast and low volume immunoassays using magnetic beads, which are used as both immobilization surfaces and bio-molecule carriers. Magnetic bead-based immunoassay, as a typical example of biochemical detection and analysis, has been successfully performed on the integrated microfluidic biochemical analysis system that includes a surface-mounted biofilter and immunosensor on a glass microfluidic motherboard. Total time required for full immunoassay was less than 20 minutes including sample incubation time and sample volume wasted was less than 50 mul during five repeated assays. Fast and low volume biochemical analysis has been successfully achieved with the developed biofilter and immunosensor, which is integrated to microfluidic system.