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    Ammonia sensor
    2.
    发明授权
    Ammonia sensor 失效
    AMMONIA传感器

    公开(公告)号：US3649505A

    公开(公告)日：1972-03-14

    申请号：US3649505D

    申请日：1969-03-03

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： STRICKLER ALLEN ,  BEEBE CEDRIC H

    IPC: A61B5/145 ,  A61B5/1477 ,  G01N27/404 ,  G01N27/416 ,  G01N27/30

    CPC classification number: G01N27/4162

    Abstract: AN ELECTROCHEMCIAL CELL FOR MEASURING THE AMMONIA CONTENT OF A SAMPLE. THE CELL COMPRISES A HYDROGEN ION SENSITIVE ELECTRODE, SUCH AS A GLASS ELECTRODE, AND A REFERENCE ELECTRODE JOINED BY AN AMMONIUM ION CONTAINING ELECTROLYTE. THE ELECTRODES AND ELECTRLYTE ARE SEPARATED FROM THE SAMPLE MEDIUM BEING ANALYZED BY MEANS OF A MICROPOROUS HYDROPHOBIC MEMBRANE WHICH IS HIGHLY PERMEABLE TO AMMONIA AND SUBSTANTIALLY IMPERMEABLE TO LIQUID AND IONS. A PREFERRED MEMBRANCE OF THIS CHARACTER IS A MICROPOROUS POLYVINYLIDENE FLUORIDE FILTER MATERIAL.

    Closed loop hygrometry
    3.
    发明授权
    Closed loop hygrometry 失效
    闭环循环

    公开(公告)号：US3661724A

    公开(公告)日：1972-05-09

    申请号：US3661724D

    申请日：1970-04-02

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： STRICKLER ALLEN

    IPC: G01N25/56 ,  G01N27/46

    CPC classification number: G01N25/56

    Abstract: Method and apparatus for determining water vapor concentration in a fluid. The apparatus includes a hygrometer having an inlet and outlet and a pump having an inlet and an outlet. A layer of semipermeable barrier material permeable to moisture and having two surfaces, the first surface being exposed to the fluid, is provided. Conduit means connects the pump, hygrometer, and the second surface of the barrier in series so that a carrier gas may be circulated by the pump in a closed loop across the second surface of the barrier and through the hygrometer. Water vapor may pass through the barrier from the fluid into the carrier gas at a transfer rate proportional to the difference in partial water vapor pressure across the barrier, whereby the water vapor concentration in the fluid can be determined from the proportional water vapor concentration measured by the hygrometer. The method of determining water vapor concentration in a fluid comprises exposing the first surface of a layer of semipermeable barrier material having two surfaces to the fluid. A carrier gas is circulated in a closed loop across the second surface of the barrier and through a hygrometer so that water vapor passes through the barrier from the fluid into the carrier gas at a transfer rate proportional to the difference in partial water vapor pressure across the barrier. The water concentration in the fluid can be determined from the proportional water vapor concentration as measured by the hygrometer.

    Abstract translation: 测定流体中水蒸气浓度的方法和装置。 该装置包括具有入口和出口的湿度计和具有入口和出口的泵。 提供可渗透水分并具有两个表面的第一表面暴露于流体的一层半透性阻隔材料。 导管装置串联连接泵，湿度计和阻隔层的第二表面，使得载气可以通过泵循环穿过隔离物的第二表面并通过湿度计。 水蒸汽可以以与渗透屏障的部分水蒸汽压力的差成比例的传递速率从流体穿过阻挡层从载体气体中流出，由此可以根据由 湿度计 确定流体中水蒸气浓度的方法包括将具有两个表面的半透明阻隔材料层的第一表面暴露于流体。 载气在封闭回路中跨过隔离物的第二表面并通过湿度计循环，使得水蒸气以与流体中的部分水蒸汽压力的差成比例的传递速率从流体通过阻挡层 屏障。 流体中的水浓度可以通过湿度计测量的比例水蒸气浓度来确定。

    CONTINUOUS ELECTROPHORESIS CELL WITH LATERAL pH GRADIENT
    4.
    发明授权
    CONTINUOUS ELECTROPHORESIS CELL WITH LATERAL pH GRADIENT 失效
    连续电泳细胞与侧向pH梯度

    公开(公告)号：US3655541A

    公开(公告)日：1972-04-11

    申请号：US3655541D

    申请日：1970-01-22

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： STRICKLER ALLEN

    IPC: G01N27/447 ,  B01K5/00

    CPC classification number: G01N27/44769

    Abstract: In a continuous electrophoresis cell, the present invention comprises means for establishing a lateral pH gradient in the electrolyte curtain whereby electrophoresis may be conducted at different lateral positions within the curtain, and in which, if desired, components may equilibrate at different lateral positions according to their isoelectric points. According to a first embodiment of the present invention, two curtain solutions of different pH are introduced continuously at laterally spaced positions. A gradient smoothing device is provided for partially mixing the two curtain solutions to such an extent that the plot of pH from one side of the curtain to the other is a continuous function, preferably approximately linear. According to a second embodiment of the invention, a hybrid arrangement permits either a two-curtain solution feed for pH effect exploration or a single curtain solution feed for conventional operation.

    Abstract translation: 在连续电泳池中，本发明包括用于在电解质帘幕中建立侧向pH梯度的装置，其中可以在帘幕内的不同横向位置进行电泳，并且如果需要，其中组分可以根据不同的横向位置平衡 他们的等电点。 根据本发明的第一实施例，两个不同pH的帘式溶液在横向隔开的位置连续地引入。 提供了一种梯度平滑装置，用于将两个帘式溶液部分地混合，使得从帘幕的一侧到另一侧的pH曲线是连续函数，优选地近似线性的程度。 根据本发明的第二实施例，混合布置允许用于pH效应探测的双帘溶液进料或用于常规操作的单帘解液进料。

    Cross-section illuminator for a continuous particle electrophoresis cell
    6.
    发明授权
    Cross-section illuminator for a continuous particle electrophoresis cell 失效
    用于连续粒子电泳细胞的交叉部分照明器

    公开(公告)号：US3663395A

    公开(公告)日：1972-05-16

    申请号：US3663395D

    申请日：1969-12-17

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： STRICKLER ALLEN

    IPC: G01N21/45 ,  G01N27/447 ,  B01K5/00

    CPC classification number: G01N27/44721 ,  G01N21/45

    Abstract: In a continuous particle electrophoresis cell, the present invention comprises means for illuminating a section of the electrolyte curtain with a narrow blade of light rather than with a broad beam which would flood the area of interest. Such blade of light illuminates the bands of sample particles only where they intersect the plane of light. By viewing the electrophoresis cell at a suitable angle, against a dark background, the crosssectional pattern of the particle band distribution becomes fully visible. This provides a valuable, practical tool for gauging and optimizing instrument performance.

    Abstract translation: 在连续的粒子电泳池中，本发明包括用狭窄的光线照射电解窗帘的一部分的装置，而不是用于使所述感兴趣区域淹没的宽梁。 这样的光线照射样品颗粒的带，只有它们与光平面相交。 通过以适当的角度观察电泳池，在暗背景下，粒子带分布的横截面图案变得完全可见。 这为测量和优化仪器性能提供了一个有价值的实用工具。

    Self cleaning sample cell for radiant energy analyzers
    7.
    发明授权
    Self cleaning sample cell for radiant energy analyzers 失效
    自动清洗样品池用于辐射能量分析仪

    公开(公告)号：US3609048A

    公开(公告)日：1971-09-28

    申请号：US3609048D

    申请日：1969-11-25

    Applicant: BECKMAN INSTRUMENTS INC

    Inventor： STRICKLER ALLEN

    IPC: G01N21/03 ,  G01N21/05 ,  G01N1/10

    CPC classification number: G01N21/15 ,  G01N21/05

    Abstract: There is disclosed a self-cleaning flow-through sample cell through which a sample fluid is conducted for analysis in a radiant energy analyzer. A fluid-combining assembly is provided to establish laminar flow of a carrier fluid in a sheath around a core of sample fluid. A conduit is connected to the fluid combining assembly to conduct and maintain the laminar flow. Windows are provided in the walls of the conduit to establish a path for radiant energy used for analysis of the sample fluid core. The sheath of carrier fluid prevents contamination of the window areas by the sample fluid.

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