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    Polarographic cell
    1.
    发明授权
    Polarographic cell 失效
    POLAROGRAPHIC CELL

    公开(公告)号：US3577332A

    公开(公告)日：1971-05-04

    申请号：US3577332D

    申请日：1967-07-12

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： PORTER JOE A ,  COUCH STEUART L

    IPC: G01N27/49 ,  G01N27/46

    CPC classification number: G01N27/404

    Abstract: A CELL FOR POLARGRAPHIC ANALYSIS OF THE TYPE EMPLOYING A PAIR OF ELECTRODES JOINED BY AN ELECTROLYTE AND SEPARATED FROM THE SAMPLE MEDIUM BY A SELECTIVELY PERMEABLE MEMBRANE. PRESSURE COMPENSATION IS PROVIDED FOR THE CELL BY EMPLOYING AN ION IMPERMEABLE BARRIER WHICH CLOSES A PASSAGE LEADING TO THE ELETROLYTE RESERVOIR IN THE CELL SO THAT CONTAMINANTS OUTSIDE OF THE CELL CANNOT REACH THE ELECTROLYTE RESERVOIR. THE BARRIER HAS A SENSITIVITY TO PRESSURE CHANGES GREATER THAN THAT OF THE MEMBRANE SO THAT THE SPACIAL RELATIONSHIP BETWEEN THE MEMBRANE AND THE SENSING ELECTRODE OF THE CELL IS NOT INFLUENCED BY CHANGING PRESSURE CONDITIONS.

    Fluid sample stream conditioning
    4.
    发明授权
    Fluid sample stream conditioning 失效
    流体样品流调节

    公开(公告)号：US3628339A

    公开(公告)日：1971-12-21

    申请号：US3628339D

    申请日：1970-01-27

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： PORTER JOE A

    IPC: B01L7/00 ,  F25B9/02

    CPC classification number: B01L7/00

    Abstract: The instant disclosure relates to apparatus for and a method of conditioning a fluid sample stream, for example, for passage through an analytical instrument. The method involves passing a gas under pressure into a vortex tube so that the gas separates into two exit streams from the vortex tube, a heated stream and a cooled stream. The cooled stream is passed into heat exchange relationship with the fluid sample stream so that the fluid sample is cooled. The heated stream is passed into heat exchange relationship with the cooled fluid sample so that the fluid sample is heated, whereby the fluid sample stream is conditioned. The apparatus includes a fluid conduit having an inlet and an outlet. A hollow heat exchange jacket having a cooling section and a heating section surrounds the conduit so as to form a heating section and a cooling section in the conduit. Means are provided for introducing a gas under pressure into a vortex tube so that the gas separates into two exit streams from the vortex tube, a heated stream and a cooled stream. Means are provided for passing the heated gas stream into the heating section of the heat exchange jacket and means are also provided for passing the cooled gas stream into the cooling section of the heat exchange jacket. Suitable means are provided for passing the fluid sample stream through the conduit so that it travels through the section surrounded by the cooling section of the jacket and through the section surrounded by the heating section, whereby the fluid sample stream is cooled and heated.

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