APPARATUS FOR CONDUCTING HIGH-TEMPERATURE LIQUID CHROMATOGRAPHY ANALYSIS
    2.
    发明公开
    APPARATUS FOR CONDUCTING HIGH-TEMPERATURE LIQUID CHROMATOGRAPHY ANALYSIS 审中-公开
    装置用于进行高温液体分析

    公开(公告)号:EP1430300A4

    公开(公告)日:2005-01-26

    申请号:EP02778296

    申请日:2002-09-20

    申请人: SYSTEC INC

    摘要: A system (Fig 8) for conducting high-temperature liquid chromatographic analysis includes a mobile phase transport tube (202) configured to operably convey mobile phase from a source to respective chromatographic instruments (206) in the system, a pre-heater (212) apparatus operably coupled to the mobile phase transport tube for heating the mobile phase to a desired temperature, a chromatographic column (206) operably coupled to the pre-heater apparatus, and including temperature-maintaining means (204) for maintaining the column at a pre-determined temperature and a counter-flow heat exchanger (212) operably exchanging heat from outlet mobile phase to inlet mobile phase trough conductive heat transfer means. In a particular embodiment, the mobile phase passing through the chromatographic column is maintained in a substantially adiabatic environment.

    A process and device for the vaporization injection of liquid samples in gas chromatographic analysis apparatuses
    7.
    发明公开
    A process and device for the vaporization injection of liquid samples in gas chromatographic analysis apparatuses 失效
    气相色谱分析装置中液体样品的挥发注射的方法和装置

    公开(公告)号:EP0461438A3

    公开(公告)日:1992-08-19

    申请号:EP91108334.3

    申请日:1991-05-23

    IPC分类号: G01N30/12

    摘要: A process for the introduction of a liquid sample into an apparatus for gas chromatographic analysis, of the type wherein said sample is injected into a vaporization chamber (2) positioned upstream a gas chromatographic column (1), equipped with means (4) to feed a carrier gas and kept at a temperature at least equal to the boiling temperature of the solvent at the operating pressure, provides to: cut off or partialize the carrier gas flow entering said chamber; evaporate at least partly the introduced sample; cause the resulting vapours to flow from the injection/evaporation position to a second exhaust position (5); perform an at least partial separation between solvent and sample components in the vapours thus obtained during said flow; exhaust said partially separated vapours from said chamber; close or partialize said exhaust and restore the carrier gas feeding sending to the column the sample portion remained in said column.

    MOBILE PHASE TREATMENT FOR CHROMATOGRAPHY
    8.
    发明公开
    MOBILE PHASE TREATMENT FOR CHROMATOGRAPHY 审中-公开
    治疗流动相色谱法

    公开(公告)号:EP1487555A1

    公开(公告)日:2004-12-22

    申请号:EP03711159.8

    申请日:2003-02-20

    IPC分类号: B01D15/08

    摘要: A convenient and efficient method for heating or cooling the mobile phase fluid of a chromatographic system prior to its entry into the chromatographic column (16) is described. The “preheating” or “precooling” process is carried out using an apparatus (10) containing a short length of tubing (11) where the mobile phase is heated or cooled. The heating or cooling is performed using a heating or cooling element (12) that is in intimate thermal contact with the exterior of the tubing (11). With a low mass heating or cooling element (12), the device can be very responsive and allows for rapid equilibration and convenient temperature programming of the mobile phase. This configuration also requires only a short mobile phase contact time, is non-invasive, adds no dead volume, and allows for use of columns over a wide range of internal diameter, flow rates and temperatures.