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    Means for separating organics containing from one to twenty carbons comprising series connected packed and capillary columns
    3.
    发明授权
    Means for separating organics containing from one to twenty carbons comprising series connected packed and capillary columns 失效
    含有包含一系列连接包装和毛细管柱的二碳的有机物的手段

    公开(公告)号：US3719084A

    公开(公告)日：1973-03-06

    申请号：US3719084D

    申请日：1970-09-21

    申请人： MC DONNELL DOUGLAS CORP

    发明人： WALKER J

    IPC分类号： G01N30/12 ,  G01N30/30 ,  G01N30/46 ,  G01N30/60 ,  G01N31/08 ,  B01D15/08

    CPC分类号： G01N30/461 ,  G01N30/6039 ,  G01N30/6078 ,  G01N30/6086 ,  G01N2030/126 ,  G01N2030/3084

    摘要： AN APPARATUS FOR SEPARATING AND/OR IDENTIFYING COMPLEX MIXTURES INCLUDING ORGANICS CONTAINING FROM ONE TO TWENTY CARBON ATMSOMS AND HAVING WIDELY DIFFERING BOILING POINTS IN A CONTINUOUS PROCESS USING TWO DIFFERENT SERIES CONNECTED TANDEM PACKED AND OPEN TUBULAR COLUMNS AND WITHOUT THE USE OF SUBAMBIENT TEMPERATURE PROGRAMMING, BACKFLUSHING OR CARRIER GAS SWITCHING TECHNIQUES. THE APPARATUS IS IN THE NATURE OF A GAS CHROMATOGRAPH HAVING SUBSTANTIALLY EXPANDED OPERATING AND DETECTION RANGES AS COMPARED TO EXISTING DEVICES USED FOR THE SAME OR SIMILAR PURPOSES AND AS SUCH THE PRESENT DEVICE HAS BROAD USES AS A RESEARCH AND AS A ROUTINE ANALYSIS TOOL AND CAN BE USED TO SEPARATE AND IDENTIFY THE PRESENCE OF CONSTITUENTS IN GASEOUS, LIQUID AND SOLID STATES. FURTHERMORE, WHILE THE MAIN USE OF THE PRESENT DEVICE IS IN CONNECTION WITH ORGANIC SUBSTANCE ANALYSIS IT CAN ALSO BE USED TO SEPARATE AND/OR DETECT THE PRESENCE OF CERTAIN INORGANIC SUBSTANCES AS WELL.

    MICROFLUIDIC DETECTION DEVICE HAVING REDUCED DISPERSION AND METHOD FOR MAKING SAME
    7.
    发明申请
    MICROFLUIDIC DETECTION DEVICE HAVING REDUCED DISPERSION AND METHOD FOR MAKING SAME 有权
    具有降低分散度的微流体检测装置及其制造方法

    公开(公告)号：US20070104408A1

    公开(公告)日：2007-05-10

    申请号：US11379348

    申请日：2006-04-19

    申请人： Douglas Cyr ,  Roger Farrow ,  Don Arnold

    发明人： Douglas Cyr ,  Roger Farrow ,  Don Arnold

    IPC分类号： G02B6/00

    CPC分类号： G01N30/74 ,  B01L3/502707 ,  B01L3/502715 ,  B01L2300/0654 ,  B01L2300/161 ,  G01N21/05 ,  G01N30/6086 ,  G01N30/6095 ,  G01N2021/0346 ,  G01N2030/746 ,  Y10T156/1052

    摘要： A microfluidic detection device provides reduced dispersion of axial concentration gradients in a flowing sample. The microfluidic detection device includes a cell body and a flow path through the cell body. The flow path has an inlet segment, an outlet segment, and a central segment, which forms a detection cell. The central segment is located between and at an angle with both the inlet segment and the outlet segment. The central segment has a first junction with the inlet segment and a second junction with the outlet segment. The cell body contains two arms that can transmit light to and from the detection cell. At least a portion of a first arm is located in the first junction and at least a portion of a second arm is located in the second junction. The portions of the arms located in the junctions are situated so that fluid entering or exiting the central segment of the flow path flows around the outer surface of one of the portions. By ensuring that the flow velocity is high near the walls both at the beginning and at the end of the conduit, the configuration serves to counteract dispersion caused by the normal parabolic velocity profile of flow through a cylindrical conduit, where the fluid velocity is highest at the center. In addition, the configuration promotes efficient sweeping of the entire volume between the two arms. A method for manufacturing the microfluidic detection device is also provided.

    摘要翻译： 微流体检测装置在流动的样品中提供减小的轴向浓度梯度的分散。 微流体检测装置包括细胞体和通过细胞体的流路。 流路具有入口段，出口段和形成检测单元的中心段。 中心段位于入口段和出口段之间并与之成一定角度。 中心段具有与入口段的第一结和与出口段的第二结。 电池体包含两个可以将光传输到检测电池和从检测电池传输光的臂。 第一臂的至少一部分位于第一接合处，并且第二臂的至少一部分位于第二接合处。 位于接合处的臂的部分被定位成使得进入或离开流动路径的中心段的流体围绕其中一个部分的外表面流动。 通过确保在导管的开始和结束处的壁附近的流速高，该构造用于抵消由通过圆柱形导管的流动的正常抛物线速度分布引起的色散，其中流体速度最高在 中心。 此外，该配置促进了在两个臂之间的整个体积的有效扫描。 还提供了一种用于制造微流体检测装置的方法。

    Microfluidic detection device having reduced dispersion and method for making same
    8.
    发明申请
    Microfluidic detection device having reduced dispersion and method for making same 有权
    具有降低的色散的微流体检测装置及其制造方法

    公开(公告)号：US20040197043A1

    公开(公告)日：2004-10-07

    申请号：US10410313

    申请日：2003-04-07

    发明人： Douglas R. Cyr ,  Roger L. Farrow ,  Don W. Arnold

    IPC分类号： G02B006/00

    CPC分类号： G01N30/74 ,  B01L3/502707 ,  B01L3/502715 ,  B01L2300/0654 ,  B01L2300/161 ,  G01N21/05 ,  G01N30/6086 ,  G01N30/6095 ,  G01N2021/0346 ,  G01N2030/746 ,  Y10T156/1052

    摘要： A microfluidic detection device provides reduced dispersion of axial concentration gradients in a flowing sample. The microfluidic detection device includes a cell body and a flow path through the cell body. The flow path has an inlet segment, an outlet segment, and a central segment, which forms a detection cell. The central segment is located between and at an angle with both the inlet segment and the outlet segment. The central segment has a first junction with the inlet segment and a second junction with the outlet segment. The cell body contains two arms that can transmit light to and from the detection cell. At least a portion of a first arm is located in the first junction and at least a portion of a second arm is located in the second junction. The portions of the arms located in the junctions are situated so that fluid entering or exiting the central segment of the flow path flows around the outer surface of one of the portions. By ensuring that the flow velocity is high near the walls both at the beginning and at the end of the conduit, the configuration serves to counteract dispersion caused by the normal parabolic velocity profile of flow through a cylindrical conduit, where the fluid velocity is highest at the center. In addition, the configuration promotes efficient sweeping of the entire volume between the two arms. A method for manufacturing the microfluidic detection device is also provided.

    摘要翻译： 微流体检测装置在流动的样品中提供减小的轴向浓度梯度的分散。 微流体检测装置包括细胞体和通过细胞体的流路。 流路具有入口段，出口段和形成检测单元的中心段。 中心段位于入口段和出口段之间并与之成一定角度。 中心段具有与入口段的第一结和与出口段的第二结。 电池体包含两个可以将光传输到检测电池和从检测电池传输光的臂。 第一臂的至少一部分位于第一接合处，并且第二臂的至少一部分位于第二接合处。 位于接合处的臂的部分被定位成使得进入或离开流动路径的中心段的流体围绕其中一个部分的外表面流动。 通过确保在导管的开始和结束处的壁附近的流速高，该构造用于抵消由通过圆柱形导管的流动的正常抛物线速度分布引起的色散，其中流体速度最高在 中心。 此外，该配置促进了在两个臂之间的整个体积的有效扫描。 还提供了一种用于制造微流体检测装置的方法。

    Temperature programmable microfabricated gas chromatography column
    9.
    发明授权
    Temperature programmable microfabricated gas chromatography column 有权
    温度可编程微生物气相色谱柱

    公开(公告)号：US06666907B1

    公开(公告)日：2003-12-23

    申请号：US10061383

    申请日：2002-01-31

    申请人： Ronald P. Manginell ,  Gregory C. Frye-Mason

    发明人： Ronald P. Manginell ,  Gregory C. Frye-Mason

    IPC分类号： B01D1508

    CPC分类号： G01N30/6095 ,  G01N30/6047 ,  G01N30/6086 ,  G01N2030/025 ,  G01N2030/3007 ,  G01N2030/3053

    摘要： A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating element and temperature sensing on the microfabricated column. Additionally, means are provided to thermally isolate the heated column from their surroundings. The small heat capacity and thermal isolation of the microfabricated column improves the thermal time response and power consumption, both important factors for portable microanalytical systems.

    摘要翻译： 温度可编程微生物气相色谱柱通过将电阻加热元件和温度感测集成在微加工柱上，可以更有效地化学分离气体混合物中的化学分析物。 此外，提供了将加热的塔与其周围环境隔离的装置。 微加热柱的小热容量和热隔离提高了热时间响应和功耗，这两个重要因素都是便携式微量分析系统。

    Piecewise uniform conduction-like flow channels and method therefor
    10.
    发明申请
    Piecewise uniform conduction-like flow channels and method therefor 失效
    分段均匀传导状流动通道及其方法

    公开(公告)号：US20030230489A1

    公开(公告)日：2003-12-18

    申请号：US10456772

    申请日：2003-06-06

    发明人： Eric B. Cummings ,  Gregory J. Fiechtner

    IPC分类号： G01N027/26

    CPC分类号： G01N30/6086 ,  B01F5/0646 ,  B01F5/0648 ,  B01F13/0059 ,  B01J19/0093 ,  B01J2219/00783 ,  B01J2219/00891 ,  B01J2219/00916 ,  B01J2219/00995 ,  B01J2219/00997 ,  B01L3/502746 ,  B01L2300/0861 ,  B01L2400/0415 ,  B01L2400/0487 ,  B01L2400/084 ,  B01L2400/086 ,  G01N27/44756 ,  G01N2030/285 ,  Y10T436/2575

    摘要： A low-dispersion methodology for designing microfabricated conduction channels for on-chip electrokinetic-based systems is presented. The technique relies on trigonometric relations that apply for ideal electrokinetic flows, allowing faceted channels to be designed on chips using common drafting software and a hand calculator. Flows are rotated and stretched along the abrupt interface between adjacent regions with differing permeability. Regions bounded by interfaces form flow nullprismsnull that can be combined with other designed prisms to obtain a wide range of turning angles and expansion ratios while minimizing dispersion. Designs are demonstrated using two-dimensional numerical solutions of the Laplace equation.

    摘要翻译： 提出了一种用于设计基于片上电动学系统的微制导传导通道的低分散方法。 该技术依赖于适用于理想电动力流动的三角关系，允许使用常规起草软件和手动计算器在芯片上设计分面通道。 流动沿着具有不同渗透性的相邻区域之间的突然界面旋转和拉伸。 由界面界定的区域形成流动“棱镜”，其可以与其他设计的棱镜组合以获得宽范围的转角和膨胀比，同时使分散最小化。 使用拉普拉斯方程的二维数值解进行设计。