Extruded microfluidic immunoassays

A. I. Ferreira, Ana P. Castanheira, R. G. Chahin, Malcolm R, Mackley, Alexander D. Edwards, Nuno M. Reis

Research output: Chapter or section in a book/report/conference proceedingChapter or section


This paper reports the miniaturisation of sandwich enzyme-linked immunosorbent assays (ELISA) using a meltextruded fluoropolymer MicroCapillary Film (MCF). A prototype 8-channel*10-microcapillaries device was used for quantitative detection a range of human biomarkers in 30 mm long fluoropolymer MCF strips. This represents a novel combination of ultra-low cost plastic microfluidic strips, low-cost optical detection, short incubation times, pre-loaded reagents and sequential fluid aspiration based on disposable plastic syringes. The observed limit of detection (LOD) was ∼lng/ml for PSA, and 10-60pg/ml for IL-lbeta, IL-6 and IL-12 inflammatory cytokines, typically with CVs ≤ 10% which is comparable with performance of optimised colorimetric microwell-based ELISA.
Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2013, Freiburg, Black Forest, Germany, 27-31 October 2013
EditorsR. Zengerle
PublisherRoyal Society of Chemistry
ISBN (Print)9780979806469
Publication statusPublished - Oct 2013


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