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Flow paths comprising one or two porous beds

  • US 8,133,438 B2
  • Filed: 01/31/2005
  • Issued: 03/13/2012
  • Est. Priority Date: 01/29/2004
  • Status: Active Grant
First Claim
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1. A microfluidic device comprising a microchannel structure in which there are two or more flow paths all of which comprises a porous bed I that is common for all of the flow paths and is provided in a detection microcavity permitting measurement on the porous bed, which bed exposes an immobilized reactant R that is capable of interacting with a solute S that passes through the bed, wherein at least one of the flow paths comprises a second porous bed II that is placed upstream of porous bed I and is dummy with respect to interaction with solute S but capable of interacting with a substance DS that is present in a liquid aliquot together with solute S and is capable of disturbing the result of the interaction between solute S and said immobilized reactant R.

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