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Electrochemical detection method and device

  • US 20050211571A1
  • Filed: 06/23/2003
  • Published: 09/29/2005
  • Est. Priority Date: 06/28/2002
  • Status: Active Grant
First Claim
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1. A device for the electrochemical detection of at least one type of a biochemical molecule—

  • contained in a liquid—

    from a group of predetermined biochemical molecules of different types, having a means (1) for taking up the liquid, said means having at least one reference electrode (RE) and at least one counterelectrode (GE) and also more than two working electrodes (AE1, AE2, AE3), at least in each case one working electrode (AE1, AE2, AE3) being provided for the detection of each type of a biochemical molecule, said working electrode being coated with a molecule that is complementary to the biochemical molecule to be detected, so that biochemical molecules of different types can be detected simultaneously, a potentiostat (P) for generating a predetermined voltage profile—

    which is variable during the measurement—

    between the working electrodes (AE1, AE2, AE3) and the reference electrode (RE), a current/voltage converter (S1, S2, S3) being connected downstream of each of the working electrodes (AE1, AE2, AE3), the current/voltage converters (S1, S2, S3) holding all of the working electrodes (AE1, AE2, AE3) at the same potential and a means (S1, S2, S3, AD) for measuring the currents flowing through the working electrodes (AE1, AE2, AE3).

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