Adjustable open-split interface for a gas chromatograph and a mass
spectrometer
    3.
    发明授权
    Adjustable open-split interface for a gas chromatograph and a mass spectrometer 失效
    用于气相色谱仪和质谱仪的可调开式开口界面

    公开(公告)号:US5281397A

    公开(公告)日:1994-01-25

    申请号:US78991

    申请日:1993-06-11

    摘要: An apparatus and a method providing an open-split interface between a gas chromatograph and a mass spectrometer for delivering a substantially solvent free sample material from the gas chromatograph to the mass spectrometer. The apparatus has a junction having an inlet to receive a gas chromatograph effluent. An inert auxiliary fluid such as helium supplied through a port is used to scavenge the solvent rich effluent to atmosphere. A transfer member disposed partially within the junction is initially positioned at a first position to accomplish the aforementioned scavenging action. The transfer member is then repositioned to a second position to direct the substantially solvent free sample to the mass spectrometer for a qualitative and a quantitative analysis.

    摘要翻译: 一种在气相色谱仪和质谱仪之间提供开放分界面的装置和方法,用于将基本上无溶剂的样品材料从气相色谱仪输送到质谱仪。 该装置具有连接点,该接头具有用于接收气相色谱流出物的入口。 通过端口提供的诸如氦的惰性辅助流体用于清除富含溶剂的流出物到大气中。 最初位于第一位置处,部分地设置在接合部内的转印部件完成上述清除动作。 然后将转移构件重新定位到第二位置以将基本上无溶剂的样品引导至质谱仪进行定性和定量分析。

    Deuterated dibutyl and monobutyl phosphates
    5.
    发明授权
    Deuterated dibutyl and monobutyl phosphates 失效
    氘代二丁基和单丁基磷酸酯

    公开(公告)号:US5302758A

    公开(公告)日:1994-04-12

    申请号:US58180

    申请日:1993-05-10

    IPC分类号: C07F9/09 C07F9/11

    CPC分类号: C07F9/11

    摘要: An improved internal standard for use in determining the concentration of decomposition products of tributyl phosphate in solvent used for solvent extraction. The improved internal standard includes deuterated variants of the decomposition products to be measured, e.g., deuterated dibutyl and monobutyl phosphoric acids. The use of deuterated dibutyl and monobutyl phosphoric acids eliminates the use of diazomethane, which is toxic and explosive, thereby providing a safer laboratory technique for routine analyses required to monitor production solvent extraction processes.

    摘要翻译: 用于确定溶剂萃取溶剂中磷酸三丁酯分解产物浓度的改进内标。 改进的内部标准包括待测量的分解产物的氘化变体,例如氘代二丁基和单丁基磷酸。 氘代二丁基和单丁基磷酸的使用消除了使用重氮甲烷的毒性和爆炸性,从而为监测生产溶剂萃取过程所需的常规分析提供了更安全的实验室技术。