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Electrochemical analytical cartridge

  • US 5,916,522 A
  • Filed: 05/14/1998
  • Issued: 06/29/1999
  • Est. Priority Date: 08/07/1997
  • Status: Expired due to Fees
First Claim
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1. An analytical cartridge for use in electrochemical analysis of fluids, said cartridge comprising:

  • a housing comprising a cartridge body which has a top surface, bottom surface and outer walls defining a housing perimeter, said body further comprising an inner end and outer end;

    a deposition well located in said cartridge body for receiving fluid to be analyzed, said deposition well having an inlet and an outlet;

    an electrochemical device for measuring the ionic activity of said fluid, said electrochemical device comprising a sample inlet for receiving said fluid and a reference inlet for receiving a reference fluid;

    a sample overflow well located in said cartridge body, said overflow well having an inlet and outlet;

    a sample metering system which comprises a sample passageway which comprises a first passageway which connects the outlet of said deposition well to the overflow well inlet and a second passageway which connects the outlet of said deposition well to the sample inlet of said electrochemical device, wherein said first and second passageways are integral with each other at said deposition well outlet;

    a reference fluid well for housing reference fluid, said reference fluid well having an outlet;

    a reference fluid passageway which is connected between said reference fluid well outlet and the reference inlet of said electrochemical device;

    a sample pressurization device for pressurizing said deposition well to provide movement of sample fluid from said sample passageway to said electrochemical device; and

    a reference fluid pressurization device for pressurizing said reference fluid well to provide movement of reference fluid through said reference fluid passageway.

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