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Issue 6, 2009
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Decomplexing biofluids using microchip based acoustophoresis

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Abstract

Highly efficient washing and extraction of microbeads to decomplex analytes ranging from small peptides to large viruses was realised in a microscaled continuous flow format. The bead washing principle reported herein is based on acoustophoresis, i.e. the primary acoustic radiation force in an ultrasonic standing wave and laminar flow properties are utilised to translate bioanalytes trapped on functionalised microbeads from one carrier fluid to another. The carry-over of non-specific material ranges from 1 to 50 ppm relative to input levels depending on application, making acoustophoresis suitable for extraction of rare species from complex environments. Selective extraction of a phosphopeptide relative to its unphosphorylated counterpart is demonstrated using metal oxide affinity capture (MOAC) beads and MALDI-TOF MS readout. Acoustophoresis of microbeads activated with specific binders could be used to capture phage viral particles. The efficiency of the acoustophoretic washing principle was demonstrated by an unspecific phage cross contamination level of only 10−6 of that in the input bead/phage mixture. The continuous flow format makes acoustophoretic washing flexible regarding sample volume and also allows for easy integration into a sequence of particle handling and analytical unit operations.

Graphical abstract: Decomplexing biofluids using microchip based acoustophoresis

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Publication details

The article was received on 28 Jun 2008, accepted on 27 Oct 2008 and first published on 01 Dec 2008


Article type: Paper
DOI: 10.1039/B811027A
Citation: Lab Chip, 2009,9, 810-818
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    Decomplexing biofluids using microchip based acoustophoresis

    P. Augustsson, J. Persson, S. Ekström, M. Ohlin and T. Laurell, Lab Chip, 2009, 9, 810
    DOI: 10.1039/B811027A

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