Fiber-optic probe for sensitive Raman analysis
    4.
    发明授权
    Fiber-optic probe for sensitive Raman analysis 失效
    用于敏感拉曼分析的光纤探头

    公开(公告)号:US4573761A

    公开(公告)日:1986-03-04

    申请号:US531877

    申请日:1983-09-14

    IPC分类号: G01N21/65 G01N21/85

    摘要: A fiber-optic probe, useful for light scattering and luminescence measurements, which comprises at least one optical fiber for transmitting light into a sample and at least two optical fibers for collecting light from the sample. The probe may further comprise a shield surrounding the fibers and having an optical window at one end to protect the fibers from hostile environments. When used in conjunction with a laser as a light source, the probe is particularly suited for Raman spectroscopy.

    摘要翻译: 一种用于光散射和发光测量的光纤探针,其包括用于将光发射到样品中的至少一个光纤和用于收集来自样品的光的至少两根光纤。 探针还可以包括围绕光纤的屏蔽,并且在一端具有光学窗口以保护光纤免受恶劣环境的影响。 当与激光器一起用作光源时,探针特别适用于拉曼光谱。

    Liquid chromatographic method and apparatus with a packed tube membrane
device for post-column derivatization/suppression reactions
    6.
    发明授权
    Liquid chromatographic method and apparatus with a packed tube membrane device for post-column derivatization/suppression reactions 失效
    液相色谱法和装置用于柱后衍生化/抑制反应的填充管膜装置

    公开(公告)号:US4751004A

    公开(公告)日:1988-06-14

    申请号:US858077

    申请日:1986-04-25

    摘要: Packing tube membranes or membrane channels for Ion Chromatography with inert or charged ion exchange beads greatly increases overall suppressor efficiency. The length of membrane required is reduced, e.g. from 20 feet to 5 feet and bandspreading is reduced from 870 .mu.l to 200 .mu.l. This significant increase in efficiency is attributed to the mixing action of the packing on the flow stream which results in convective radial transport much more rapid than the diffusion controlled transport observed in unpacked membranes. The technique is also described for developing more efficient liquid chromatographic post-column reactors for adding reagent to the column effluent to increase detection sensitivity.

    摘要翻译: 用惰性或带电离子交换珠离子色谱的包装管膜或膜通道大大提高了总体抑制效率。 需要的膜的长度减少,例如 从20英尺到5英尺,带宽从870平方米减少到200亩。 这种效率的显着提高归因于填料在流动流上的混合作用,其导致对流的径向传输比在未包装的膜中观察到的扩散控制传输更快。 还描述了该技术,用于开发更有效的液相色谱柱后反应器,用于向柱流出物中添加试剂以提高检测灵敏度。