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584 条记录 (耗时 0.023 秒)

    Cartridge heater for a gas chromatography transfer device
    61.
    发明授权
    Cartridge heater for a gas chromatography transfer device 有权
    用于气相色谱转移装置的盒式加热器

    公开(公告)号：US6054683A

    公开(公告)日：2000-04-25

    申请号：US293674

    申请日：1999-04-16

    申请人： Ralf Bremer ,  Bernhard Rose

    发明人： Ralf Bremer ,  Bernhard Rose

    IPC分类号： G01N30/16 ,  G01N30/30 ,  B01D15/08 ,  G01N31/00 ,  H05B1/02

    CPC分类号： G01N30/30

    摘要： The invention relates to a cartridge heater for a gas chromatography transfer device for substances which are to be analyzed, having a metal tube for accommodating a tube section to be heated and a heating coil arranged outside the metal tube, the metal tube bearing, on the outside, a groove which corresponds to the shape of the heating coil and in which a heating conductor is embedded in an electrically insulated manner with respect to the metal tube.

    摘要翻译： 本发明涉及一种用于待分析物质的气相色谱转移装置的盒式加热器，具有用于容纳待加热的管段的金属管和布置在金属管外侧的加热线圈，金属管轴承 外侧具有与加热线圈的形状对应的槽，并且其中相对于金属管以电绝缘方式嵌入加热导体。

    Precolumn separator for gas chromatograph
    65.
    发明授权
    Precolumn separator for gas chromatograph 失效
    气相色谱仪前柱分离器

    公开(公告)号：US5944877A

    公开(公告)日：1999-08-31

    申请号：US148978

    申请日：1998-09-01

    申请人： Gregory G. O'Neil

    发明人： Gregory G. O'Neil

    IPC分类号： G01N30/02 ,  G01N30/08 ,  G01N30/12 ,  G01N30/16 ,  B01D15/08

    CPC分类号： G01N30/12 ,  G01N30/08 ,  G01N2030/025 ,  G01N2030/085 ,  G01N2030/127 ,  G01N2030/167

    摘要： A precolumn separator provides a method of separating a solvent from a sample for use in a gas chromatograph. The precolumn has an independent carrier gas control mechanism which allows the carrier gas to be passed through the preseparation column at a rate favorable for stripping the solvent from the sample. The solvent-laden carrier gas is then purged through a purge vent which is separate from the gas chromatograph. After a period of time which effectively permits the carrier gas to be significantly removed from the sample, the flow rate of the carrier gas is reduced to the normal operating gas flow rate and the purge vent is closed. The sample is then passed through the column to the gas chromatographic column. A second purge vent can then be directed to the purge vent inlet in the gas chromatograph. Preferably, the preseparation column is a packed column which includes a separate heating element. The heating element, in turn, can be surrounded by an air cooled jacket. The air cooled jacket has an inlet at the bottom of the preseparation column and a spiral flow path around the heater. This will cause the bottom of the preseparation column to be cooler than the upper portion which, in turn, will cause a compression of the sample near the outlet. This permits stripping of a significant amount of solvent from the sample while, at the same time, eliminating the need to match the sample injection rate to the solvent evaporation rate.

    摘要翻译： 预柱分离器提供了从样品中分离溶剂用于气相色谱仪的方法。 预柱具有独立的载气控制机构，其允许载气以有利于从样品中除去溶剂的速率通过预分离塔。 然后将含溶剂的载气通过与气相色谱分离的吹扫口吹扫。 在有效地允许载气从样品中被显着除去的一段时间之后，载气的流量降低到正常的操作气体流速，并且排气口关闭。 然后将样品通过柱进入气相色谱柱。 然后可以将第二吹扫口导入气相色谱仪中的吹扫口。 优选地，预分离柱是包括单独的加热元件的填充柱。 加热元件又可以被空气冷却的外套包围。 空气冷却套管在预分离塔的底部具有入口，并且在加热器周围具有螺旋流动路径。 这将导致预分离塔的底部比上部更冷，这反过来将导致样品在出口附近的压缩。 这允许从样品中剥离大量的溶剂，同时，消除了将样品注入速率与溶剂蒸发速率相匹配的需要。

    Real-time gas-chromatography mass-spectrometry trace vapor detection
    66.
    发明授权
    Real-time gas-chromatography mass-spectrometry trace vapor detection 失效
    实时气相色谱质谱痕量蒸气检测

    公开(公告)号：US5872306A

    公开(公告)日：1999-02-16

    申请号：US27947

    申请日：1998-02-23

    申请人： James T. Arnold

    发明人： James T. Arnold

    IPC分类号： G01N27/62 ,  G01N30/02 ,  G01N30/08 ,  G01N30/10 ,  G01N30/12 ,  G01N30/16 ,  G01N30/72 ,  B01D15/08

    CPC分类号： G01N30/16 ,  G01N2030/025 ,  G01N2030/121 ,  G01N30/10 ,  G01N30/7206 ,  Y10T436/255

    摘要： A gas flow distribution system accumulates a sample from a sample bearing carrier gas in a micro-accumulator, delivers it using a carrier gas to a gas chromatography column, and supplies a carrier gas to the gas chromatography column to facilitate separation of the sample into sample components and transport the sample components to a mass spectrometer for trace vapor detection and analysis or testing in real time. The system is made of inert components and configured to have low dead volume for improved performance and accuracy of detection. External valves are employed for easy management and balance of the flow in the system to minimize operation time and facilitate continuous accumulation, delivery, and testing of the sample. The delivery of the sample to the gas chromatography column using an electrically heated cold trap as the micro-accumulator can be performed extremely fast. By further combining the sample accumulation phase and the sample testing phase, real time operation of trace vapor detection is achieved. Because the step of delivering the sample to the gas chromatography column is performed quickly, the accumulation of the sample can resume quickly and is nearly continuous for improved efficiency.

    摘要翻译： 气体流量分配系统将来自承载载气样品的样品积聚在微型蓄能器中，并使用载气将其输送到气相色谱柱，并将载气提供给气相色谱柱，以便于将样品分离成样品 组件，并将样品组分运送到质谱仪上进行痕量蒸汽检测和分析或实时测试。 该系统由惰性部件制成，并且被配置为具有较低的死体积以提高检测的性能和准确度。 使用外部阀门可以方便地管理和平衡系统中的流量，以最大限度地减少操作时间，并促进样品的连续积累，传送和测试。 使用电加热的冷阱作为微量储存器将样品递送到气相色谱柱可以非常快地进行。 通过进一步组合样品积累阶段和样品测试阶段，实现痕量蒸汽检测的实时操作。 因为将样品输送到气相色谱柱的步骤快速进行，所以样品的积累可以快速恢复并且几乎连续以提高效率。

    Real-time gas-chromatography mass-spectrometry trace vapor detection
    67.
    发明授权
    Real-time gas-chromatography mass-spectrometry trace vapor detection 失效

    公开(公告)号：US5827945A

    公开(公告)日：1998-10-27

    申请号：US738961

    申请日：1996-10-24

    申请人： James T. Arnold

    发明人： James T. Arnold

    IPC分类号： G01N27/62 ,  G01N30/02 ,  G01N30/08 ,  G01N30/10 ,  G01N30/12 ,  G01N30/16 ,  G01N30/72

    CPC分类号： G01N30/16 ,  G01N2030/025 ,  G01N2030/121 ,  G01N30/10 ,  G01N30/7206 ,  Y10T436/255

    摘要： A gas flow distribution system accumulates a sample from a sample bearing carrier gas in a micro-accumulator, delivers it using a carrier gas to a gas chromatography column, and supplies a carrier gas to the gas chromatography column to facilitate separation of the sample into sample components and transport the sample components to a mass spectrometer for trace vapor detection and analysis or testing in real time. The system is made of inert components and configured to have low dead volume for improved performance and accuracy of detection. External valves are employed for easy management and balance of the flow in the system to minimize operation time and facilitate continuous accumulation, delivery, and testing of the sample. The delivery of the sample to the gas chromatography column using an electrically heated cold trap as the micro-accumulator can be performed extremely fast. By further combining the sample accumulation phase and the sample testing phase, real time operation of trace vapor detection is achieved. Because the step of delivering the sample to the gas chromatography column is performed quickly, the accumulation of the sample can resume quickly and is nearly continuous for improved efficiency.

    Method and device for the injection of liquid samples in a gas chromatograph
    68.
    发明授权
    Method and device for the injection of liquid samples in a gas chromatograph 失效
    在气相色谱仪中注射液体样品的方法和装置

    公开(公告)号：US5759234A

    公开(公告)日：1998-06-02

    申请号：US768960

    申请日：1996-12-18

    申请人： Fausto Munari ,  Pier Albino Colombo ,  Konrad Grob

    发明人： Fausto Munari ,  Pier Albino Colombo ,  Konrad Grob

    IPC分类号： G01N30/12 ,  G01N30/16 ,  B01D15/08

    CPC分类号： G01N30/12 ,  G01N2030/127 ,  G01N2030/167

    摘要： The invention relates to a method and a device to control the physical conditions of the solvent within a pre-column, in a gas chromatography analysis apparatus. To achieve desired and controlled conditions of recondensation in the pre-column with vaporization injectors or of vaporation with "on-column" injectors, the dew-point of the solvent in the pre-column is calculated and the factors which influence this dew-point are varied and/or the temperature of the pre-column is varied, in order to set such temperatures in a desired correlation.

    摘要翻译： 本发明涉及在气相色谱分析装置中控制预柱中溶剂物理条件的方法和装置。 为了通过蒸发注射器或蒸发式“柱内”注射器在预柱中实现所需和受控的再凝结条件，计算预柱中溶剂的露点和影响该露点的因素 变化和/或改变预柱的温度，以便将所述温度设置在期望的相关性中。

    Multiple sample sequential chemical analysis
    70.
    发明授权
    Multiple sample sequential chemical analysis 失效
    多次连续化学分析

    公开(公告)号：US5508204A

    公开(公告)日：1996-04-16

    申请号：US371952

    申请日：1995-01-12

    申请人： Eric J. Norman

    发明人： Eric J. Norman

    IPC分类号： G01N30/16 ,  G01N30/30 ,  G01N30/02

    CPC分类号： G01N30/30 ,  G01N2030/3007 ,  G01N2030/3076 ,  G01N30/16 ,  Y10T436/200833 ,  Y10T436/201666 ,  Y10T436/24

    摘要： A method for analyzing multiple analyte specimens using an analytical column containing a selective adsorbent media. A carrier fluid flows through the column. The method involves introducing a first analyte specimen into the analytical column at an initial temperature. The analytical column is then heated to an intermediate temperature to cause the first analyte specimen to partially travel into the column. The analytical column is then cooled back to the initial temperature, followed by introduction of a second analyte specimen into the analytical column. The analytical column is then heated to a final temperature greater than the intermediate temperature, during which heating analytes from the first and second analyte specimen concurrently and discretely travels through, and sequentially elutes from, the analytical column. The method results in discrete bands of analyte being loaded at spaced intervals within the column, and can be used to load a multiplicity of samples for concurrent analysis. This results in sequential elution of the discrete analyte bands at the end of the analysis, providing for a substantial reduction in time as compared to running multiple samples separately. The method is well suited for the analysis of methylmalonic acid content in multiple urine specimens.

    摘要翻译： 使用含有选择性吸附介质的分析柱分析多个分析物标本的方法。 载液流经柱。 该方法包括在初始温度下将第一分析物样品引入分析柱。 然后将分析柱加热到中间温度以使第一分析物样品部分地进入柱。 然后将分析柱冷却回到初始温度，然后将第二分析物样品引入分析柱。 然后将分析柱加热到大于中间温度的最终温度，在此期间，来自第一和第二分析物样品的分析物同时并离散地穿过分析柱并从分析柱依次洗脱。 该方法导致分析物的离散带在​​柱内以间隔的间隔加载，并且可用于加载多个样品用于并行分析。 这导致在分析结束时分离的分析物带的顺序洗脱，与分开运行多个样品相比，提供了显着减少的时间。 该方法适用于多种尿样中甲基丙二酸含量的分析。