Isotope analysis
    1.
    发明授权
    Isotope analysis 失效
    同位素分析

    公开(公告)号:US3924124A

    公开(公告)日:1975-12-02

    申请号:US47577474

    申请日:1974-06-03

    CPC classification number: H01J49/0027

    Abstract: The difference in concentration of a selected isotope in two materials is measured by directing gaseous beams of the materials toward the inlet of a mass spectrometer. A shutter alternately blocks transmission of the two beams. An output signal from the mass spectrometer, which is representative of a selected isotope, is passed to a synchronous detector, as is a reference signal which is representative of the speed of operation of the shutter.

    Abstract translation: 通过将材料的气体束导向质谱仪的入口来测量两种材料中所选择的同位素的浓度差异。 快门交替地阻止两个光束的传输。 代表所选同位素的来自质谱仪的输出信号被传送到同步检测器,参考信号代表快门的操作速度。

    Total sample indicator for chromatography
    5.
    发明授权
    Total sample indicator for chromatography 失效
    用于色谱的总样本指示剂

    公开(公告)号:US3686923A

    公开(公告)日:1972-08-29

    申请号:US3686923D

    申请日:1969-12-16

    Inventor: FAVRE JOHN A

    CPC classification number: G01N30/10 G01N30/78

    Abstract: In a chromatographic analyzer, the carrier fluid stream is split at a point downstream from the sample injection. A first portion of the stream is passed through the chromatographic column in a conventional manner. The second portion of the stream is passed directly to the detector to provide an indication of the amount of sample injected.

    Abstract translation: 在色谱分析仪中,载体流体流在样品注射下游的一点处分裂。 流的第一部分以常规方式通过色谱柱。 流的第二部分直接传递到检测器以提供注入样品量的指示。

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