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    12.
    发明专利
    未知

    公开(公告)号：CH611422A5

    公开(公告)日：1979-05-31

    申请号：CH744576

    申请日：1976-06-11

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： BUZZA EDMUND E ,  STERNBERG JAMES C

    IPC: G01N27/416 ,  G01N33/487 ,  G01N33/49 ,  G01N27/56 ,  G01N33/16

    Abstract: Apparatus for measuring carbon dioxide and chloride in blood. A blood sample is reacted with acid in a sample container to release carbon dioxide, a portion of which diffuses through a gas-permeable membrane and reacts with an electrolyte to change the pH thereof. A pair of pH measuring electrodes monitor the electrolyte pH at respective locations adjacent to and remote from the region of reaction within the electrolyte. The pH electrodes are coupled to respective input terminals of a differential amplifier to derive a differential pH signal. The differential pH signal is differentiated to derive a rate of change of pH output signal which is measured to indicate the concentration of carbon dioxide. The pH measuring electrodes are in electrolytic communication and means is provided to renew the electrolyte between measurements. Coulometric measurement of chloride in the sample is performed simultaneously with the carbon dioxide measurement.

    CONCENTRATION CELL
    13.
    发明专利
    CONCENTRATION CELL 未知

    公开(公告)号：AU1468276A

    公开(公告)日：1977-12-15

    申请号：AU1468276

    申请日：1976-06-07

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： BUZZA EDMUND E ,  STERNBERG JAMES C

    IPC: G01N27/416 ,  G01N33/487 ,  G01N33/49 ,  G01N27/58 ,  G01N27/30 ,  G01N27/40 ,  G01N33/16

    Abstract: Apparatus for measuring carbon dioxide and chloride in blood. A blood sample is reacted with acid in a sample container to release carbon dioxide, a portion of which diffuses through a gas-permeable membrane and reacts with an electrolyte to change the pH thereof. A pair of pH measuring electrodes monitor the electrolyte pH at respective locations adjacent to and remote from the region of reaction within the electrolyte. The pH electrodes are coupled to respective input terminals of a differential amplifier to derive a differential pH signal. The differential pH signal is differentiated to derive a rate of change of pH output signal which is measured to indicate the concentration of carbon dioxide. The pH measuring electrodes are in electrolytic communication and means is provided to renew the electrolyte between measurements. Coulometric measurement of chloride in the sample is performed simultaneously with the carbon dioxide measurement.

    LIQUID TRANSFER VALVE
    17.
    发明专利
    LIQUID TRANSFER VALVE 未知

    公开(公告)号：CA1130170A

    公开(公告)日：1982-08-24

    申请号：CA374282

    申请日：1981-03-31

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： BUZZA EDMUND E

    IPC: F16K11/02 ,  G01N1/00 ,  G01N1/38 ,  G01N35/10 ,  G01N35/08

    Abstract: 417D-252 Canada LIQUID TRANSFER VALVE A liquid transfer valve including movable valve portions. A second valve portion is movable with respect to a first valve portion to allow a probe to extend therethrough to pick up a sample liquid. Upon probe retraction, the second valve portion is movable to a position which allows the sample liquid to be injected into the valve where it is diluted and carried to a remote detector or delivery point.

    18.
    发明专利
    未知

    公开(公告)号：DE2554803A1

    公开(公告)日：1977-03-10

    申请号：DE2554803

    申请日：1975-12-05

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： BUZZA EDMUND E ,  STERNBERG JAMES C

    IPC: G01N27/416 ,  G01N33/487 ,  G01N33/49 ,  G01N27/46 ,  G01N33/16

    Abstract: Apparatus for measuring carbon dioxide and chloride in blood. A blood sample is reacted with acid in a sample container to release carbon dioxide, a portion of which diffuses through a gas-permeable membrane and reacts with an electrolyte to change the pH thereof. A pair of pH measuring electrodes monitor the electrolyte pH at respective locations adjacent to and remote from the region of reaction within the electrolyte. The pH electrodes are coupled to respective input terminals of a differential amplifier to derive a differential pH signal. The differential pH signal is differentiated to derive a rate of change of pH output signal which is measured to indicate the concentration of carbon dioxide. The pH measuring electrodes are in electrolytic communication and means is provided to renew the electrolyte between measurements. Coulometric measurement of chloride in the sample is performed simultaneously with the carbon dioxide measurement.

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