Chromatographic flow cell and method of making it
    81.
    发明授权
    Chromatographic flow cell and method of making it 失效
    色谱流通池及其制作方法

    公开(公告)号:US4575424A

    公开(公告)日:1986-03-11

    申请号:US585347

    申请日:1984-03-01

    摘要: To accommodate microscale chromatographs, a flow cell has an inlet port, inlet path, light path, outlet path and outlet port, with the inlet and outlet paths being formed continuously around wires of the proper diameters during molding. The wires pass through the mold and against a metal light-path insert during molding and are removed from the plastic after molding to form portions of the inlet and outlet paths. The insert for the light path is formed in two parts, each having a groove in the form of a half cylinder along its center for the light path and having channels on each side. The paths are machined prior to lapping, and after lapping, the light path is coated with a bright metal such as rhodium and then it is burnished for a mirror image with a roughness of less than sixteen RMS micro inches.

    摘要翻译: 为了适应微量色谱,流通池具有入口,入口路径,光路,出口路径和出口,入口和出口路径在成型期间连续地围绕适当直径的线形成。 导线在模制期间通过模具并抵靠金属光路插入件,并且在模制之后从塑料上移除以形成入口和出口路径的部分。 用于光路的插入件形成为两个部分,每个部分具有半圆形形式的凹槽,沿着其中心的光路并且在每侧具有通道。 路径在研磨之前被加工,并且在研磨之后,光路涂覆有诸如铑的明亮金属,然后被抛光用于具有小于十六RMS RMS英寸的粗糙度的镜像。

    Apparatus for reducing tailing in a liquid chromatograph
    82.
    发明授权
    Apparatus for reducing tailing in a liquid chromatograph 失效
    用于在液相色谱仪中减少拖尾的装置

    公开(公告)号:US4545904A

    公开(公告)日:1985-10-08

    申请号:US585298

    申请日:1984-03-01

    IPC分类号: B01D15/08 G01N30/60 G01N30/74

    摘要: To reduce tailing, the frit at the outlet to the liquid chromatographic column has a diameter substantially equal to that of the inside diameter of the outlet end of the column and less than 2 millimeters. It is held directly against the packing of the column within a cylindrical member having a shoulder with a central aperture at least the size of the diameter of the frit and cylindrical walls which are fastened to resist force in the direction of the axis of the column from its inlet to its outlet. A gasket seals the cylindrical holder against the column wall.

    摘要翻译: 为了减少拖尾,液相色谱柱出口处的玻璃料的直径基本上等于柱的出口端的内径,直径小于2毫米。 它被直接抵靠在具有肩部的圆柱形构件的圆柱形构件中,所述圆柱形构件具有至少具有中心孔的至少大小的玻璃料和圆柱形壁的直径的尺寸,所述玻璃料和圆柱形壁被紧固以抵抗在柱的轴线方向上的力 其入口到其出口。 垫圈将柱形保持器密封在柱壁上。

    Apparatus for measuring the nuclear radiation of a sequence of
radioactive samples
    83.
    发明授权
    Apparatus for measuring the nuclear radiation of a sequence of radioactive samples 失效
    用于测量放射性样品序列的核辐射的装置

    公开(公告)号:US4029961A

    公开(公告)日:1977-06-14

    申请号:US567436

    申请日:1975-04-11

    IPC分类号: G01T7/08 G01T1/00

    CPC分类号: G01T7/08

    摘要: To measure the nuclear radiation of a sequence of radioactive samples, magazines that hold sample containers are removably positioned in shuttles, some of which are driven step-by-step by a toothed belt that engages racks on the sides of the shuttles from one compartment to another through a measuring station, with the shuttles that are being driven by the belt driving other shuttles not in engagement with the belt at that time. In the measuring station, the sample containers are released from the magazines one at a time through openings in their bottoms and lowered by a reciprocable support to a position adjacent to a radiation detector for the measurement, after which they are raised by the support to the magazine and the shuttle is driven one more step to the next position.

    摘要翻译: 为了测量放射性样品序列的核辐射,容纳样品容器的杂志可移除地定位在梭子中,其中一些是通过齿形带逐步驱动的,该齿形带将梭子的侧面上的机架从一个隔间接合到 另一个通过测量站,其中由带子驱动的梭子驱动与此时不与皮带接合的其他梭子。 在测量站中,样品容器一次通过其底部的开口从杂志中释放出来,并通过可往复运动的支撑件下降到与用于测量的辐射探测器相邻的位置,然后由支架将其升高到 杂志和班车再次迈向下一个位置。

    Heat of interaction detector
    84.
    发明授权
    Heat of interaction detector 失效
    相互作用探测器的热量

    公开(公告)号:US3967492A

    公开(公告)日:1976-07-06

    申请号:US251712

    申请日:1972-05-09

    IPC分类号: G01N21/41 G01K17/00 G01N31/06

    摘要: To reduce the sensitivity of a heat of adsorption detector to changes in the flow rate of the carrier solvent upon a reference thermistor and a measuring thermistor, the flow of heat is adjusted to balance the flow-rate-dependent temperature increases against the flow-rate-dependent temperature decreases that occur with the same change in flow rate. Some of the techniques for adjusting the flow of heat are: (1) controlling the temperature of the solvent at the inlet of the heat of adsorption detector with one heat exchanger and the temperature of the body of the heat of adsorption detector with another heat exchanger; (2) controlling the temperature of the walls of the heat of adsorption detector with a heating coil; and (3) controlling the heat emitted by the thermistors.

    摘要翻译: 为了降低吸附检测器对载体溶剂在参考热敏电阻和测量热敏电阻上的流速变化的敏感性,调节热量以平衡流速依赖于温度升高与流速 相关温度随着流速的变化而降低。 用于调节热流的一些技术是:(1)利用一个热交换器控制吸附检测器热入口处的溶剂的温度,并用另一个热交换器控制吸附检测器的热体的温度 ; (2)用加热线圈控制吸附探测器热量壁的温度; 和(3)控制热敏电阻发出的热量。