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

TLDR

The study develops an integrated microfluidic biochemical detection system for rapid, low‑volume immunoassays using magnetic beads. The system combines microfluidic components, a surface‑mounted biofilter, and an electrochemical sensor on a glass microfluidic motherboard to perform magnetic bead‑based immunoassays. The system completes an immunoassay in under 20 min with less than 50 µl sample volume, enabling fast, low‑volume biochemical analysis suitable for protein studies.

Abstract

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. Microfluidic components have been developed and integrated to construct a microfluidic biochemical detection system. 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 electrochemical sensor on a glass microfluidic motherboard. Total time required for an immunoassay was less than 20 min including sample incubation time, and sample volume wasted was less than 50 μl during five repeated assays. Fast and low-volume biochemical analysis has been successfully achieved with the developed biofilter and immunosensor, which is integrated to the microfluidic system. Such a magnetic bead-based biochemical detection system, described in this paper, can be applied to protein analysis systems.