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Dual working-electrode electrochemical detector for high performance liquid chromatography

  • US 4,554,064 A
  • Filed: 03/28/1984
  • Issued: 11/19/1985
  • Est. Priority Date: 03/28/1984
  • Status: Expired due to Fees
First Claim
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1. A dual working-electrode electrochemical detector for measuring characteristics of a biological fluid, comprising:

  • a first working electrode;

    a second working electrode;

    means for holding the two electrodes in close, opposed parallel relationship;

    spacer means between said first and second electrodes for maintaining said electrodes in spaced relationship;

    means forming a channel for the flow of said fluid between said electrodes;

    feed means for feeding fluid to one end of said channel; and

    retrieval means for retrieving fluid from the other end of said channel;

    potentials applied to said electrodes being separately controllable whereby said electrodes can be held at different potentials;

    wherein said means for holding said electrode comprises a first hollow member having an open side, said first electrode covering said open side of said first hollow member;

    a first opening extending through said first hollow member to one end of said channel;

    a second opening extending through said first hollow member to the other end of said channel;

    a first opening in said first electrode being aligned with said first opening in said first hollow member;

    a second opening in said electrode being aligned with said second opening in said first hollow member;

    feed means being attached to said first opening in said first hollow member and extending to said one end of said channel;

    retrieval means being attached to said second opening in said first hollow member and extending to said other end of said channel;

    whereby fluid is fed to said one end of said channel and retrieved at the other end thereof;

    and including a second hollow member with an open side, said second electrode covering said open side of said second hollow member; and

    means for holding said first and second hollow members in fluid-tight engagement with said first and second electrodes facing each other;

    wherein said means for holding comprises a first yoke disposed over said first hollow member and a second yoke disposed over said second hollow member;

    said first yoke having a first opening aligned with the first opening of said first hollow member and a second opening aligned with the second opening in said first hollow member.

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