PMID- 18369508 OWN - NLM STAT- MEDLINE DCOM- 20080702 LR - 20151119 IS - 1473-0197 (Print) IS - 1473-0189 (Linking) VI - 8 IP - 4 DP - 2008 Apr TI - A polymer lab-on-a-chip for magnetic immunoassay with on-chip sampling and detection capabilities. PG - 542-9 LID - 10.1039/b715569g [doi] AB - This paper presents a new polymer lab-on-a-chip for magnetic bead-based immunoassay with fully on-chip sampling and detection capabilities, which provides a smart platform of magnetic immunoassay-based lab-on-a-chip for point-of-care testing (POCT) toward biochemical hazardous agent detection, food inspection or clinical diagnostics. In this new approach, the polymer lab-on-a-chip for magnetic bead-based immunoassay consists of a magnetic bead-based separator, an interdigitated array (IDA) micro electrode, and a microfluidic system, which are fully incorporated into a lab-on-a-chip on cyclic olefin copolymer (COC). Since the polymer lab-on-a-chip was realized using low cost, high throughput polymer microfabrication techniques such as micro injection molding and hot embossing method, a disposable polymer lab-on-a-chip for the magnetic bead-based immunoassay can be successfully realized in a disposable platform. With this newly developed polymer lab-on-a-chip, an enzyme-labelled electrochemical immunoassay (ECIA) was performed using magnetic beads as the mobile solid support, and the final enzyme product produced from the ECIA was measured using chronoamperometry. A sampling and detection of as low as 16.4 ng mL(-1) of mouse IgG has been successfully performed in 35 min for the entire procedure. FAU - Do, Jaephil AU - Do J AD - Microsystems and BioMEMS Laboratory, Center for BioMEMS and Nanobiosciences, Department of Electrical and Computer Engineering and Computer Science, University of Cincinnati, Cincinnati, OH 45221, USA. dohj@ececs.uc.edu FAU - Ahn, Chong H AU - Ahn CH LA - eng GR - NIH-P021-L684/PHS HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20080228 PL - England TA - Lab Chip JT - Lab on a chip JID - 101128948 RN - 0 (Immunoglobulin G) RN - 0 (Polymers) SB - IM MH - Animals MH - Biosensing Techniques/economics/instrumentation/*methods MH - Electrochemistry MH - Immunoassay/economics/instrumentation/*methods MH - Immunoglobulin G/*analysis/metabolism MH - Lab-On-A-Chip Devices MH - *Magnetics MH - Mice MH - Microchip Analytical Procedures/economics/*methods MH - Polymers/*chemistry MH - Sensitivity and Specificity MH - Time Factors EDAT- 2008/03/29 09:00 MHDA- 2008/07/03 09:00 CRDT- 2008/03/29 09:00 PHST- 2008/03/29 09:00 [pubmed] PHST- 2008/07/03 09:00 [medline] PHST- 2008/03/29 09:00 [entrez] AID - 10.1039/b715569g [doi] PST - ppublish SO - Lab Chip. 2008 Apr;8(4):542-9. doi: 10.1039/b715569g. Epub 2008 Feb 28.