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13 条记录 (耗时 0.021 秒)

    Disposable working electrode for an electrochemical cell
    1.
    发明授权
    Disposable working electrode for an electrochemical cell 有权

    公开(公告)号：US06783645B2

    公开(公告)日：2004-08-31

    申请号：US10081691

    申请日：2002-02-20

    申请人： Jun Cheng ,  Petr Jandik ,  Nebojsa Avdalovic

    发明人： Jun Cheng ,  Petr Jandik ,  Nebojsa Avdalovic

    IPC分类号： C25B902

    CPC分类号： G01N27/307 ,  Y10T29/49002

    摘要： A flow-through electrochemical cell assembly with a disposable working electrode structure, including (a) a perimeter wall defining a sample flow channel including an inlet and an outlet, (b) a sample inlet line in fluid communication with the sample flow channel inlet, (c) a sample outlet line providing fluid communication between the sample flow channel outlet and a remote reference electrode, and (d) a disposable working electrode structure comprising an electrically conductive and electrochemically active working electrode region bound as a layer, directly or indirectly, to an electrically insulating substrate surface. The substrate surface is in fluid-sealing relationship with the sample flow channel, and the working electrode region is in fluid communication with said sample flow channel. The working electrode is vapor deposited, directly or indirectly, onto the organic polymer substrate through a mask, and a fluid seal is formed between said working electrode region and perimeter wall.

    ELECTROCHEMICAL DETECTION CELL FOR LIQUID CHROMATOGRAPHY SYSTEM
    2.
    发明申请
    ELECTROCHEMICAL DETECTION CELL FOR LIQUID CHROMATOGRAPHY SYSTEM 有权
    用于液相色谱系统的电化学检测细胞

    公开(公告)号：US20110192722A1

    公开(公告)日：2011-08-11

    申请号：US12703668

    申请日：2010-02-10

    申请人： Jun Cheng ,  Petr Jandik ,  Christopher A. Pohl

    发明人： Jun Cheng ,  Petr Jandik ,  Christopher A. Pohl

    IPC分类号： G01N27/26

    CPC分类号： G01N27/30 ,  G01N27/301 ,  G01N27/4166 ,  G01N30/64

    摘要： A detection cell for a chromatography system includes a cell body having an inlet, an outlet, and a counter electrode, a working electrode, a sample flow passageway extending between the inlet and the outlet and in fluid contact with the counter and working electrodes, and a palladium/noble metal reference electrode system. A method of using the detection cell is also described.

    摘要翻译： 用于色谱系统的检测电池包括具有入口，出口和对电极的电池体，工作电极，在入口和出口之间延伸并与计数器和工作电极流体接触的样品流动通道，以及 钯/贵金属参考电极系统。 还描述了使用检测单元的方法。

    Pulsed electrochemical detection method
    3.
    发明授权
    Pulsed electrochemical detection method 有权
    脉冲电化学检测方法

    公开(公告)号：US07566392B2

    公开(公告)日：2009-07-28

    申请号：US11403565

    申请日：2006-04-12

    申请人： Jun Cheng ,  Petr Jandik ,  Xiaodong Liu ,  Christopher A. Pohl

    发明人： Jun Cheng ,  Petr Jandik ,  Xiaodong Liu ,  Christopher A. Pohl

    IPC分类号： G01N27/403

    CPC分类号： G01N27/49

    摘要： In one embodiment, the present invention is directed to a pulsed electrochemical detection method comprising (a) flowing a liquid sample stream including at least one analyte past a working electrode in a flow-through cell; (b) applying at least three pulsed electrical potentials to the working electrode, (1) a first conditioning potential, (2) a second detection and oxidative cleaning potential, and (3) a third reductive cleaning potential, said second potential being higher than said first and third potentials and said first potential being higher than said third potential; and (c) detecting the output from said working electrode during the time period of applying said second potential.

    摘要翻译： 在一个实施方案中，本发明涉及脉冲电化学检测方法，其包括（a）将包含至少一种分析物的液体样品流流过流通池中的工作电极; （b）向工作电极施加至少三个脉冲电势，（1）第一调节电位，（2）第二检测和氧化清洗电位，和（3）第三还原清洗电位，所述第二电位高于 说第一和第三个潜力，并说第一个潜力高于第三个潜力; 以及（c）在施加所述第二电位的时间段期间检测来自所述工作电极的输出。

    Pulsed electrochemical detection method
    4.
    发明申请
    Pulsed electrochemical detection method 有权
    脉冲电化学检测方法

    公开(公告)号：US20070240998A1

    公开(公告)日：2007-10-18

    申请号：US11403565

    申请日：2006-04-12

    申请人： Jun Cheng ,  Petr Jandik ,  Xiaodong Liu ,  Christopher Pohl

    发明人： Jun Cheng ,  Petr Jandik ,  Xiaodong Liu ,  Christopher Pohl

    IPC分类号： G01N27/26

    CPC分类号： G01N27/49

    摘要： In one embodiment, the present invention is directed to a pulsed electrochemical detection method comprising (a) flowing a liquid sample stream including at least one analyte past a working electrode in a flow-through cell; (b) applying at least three pulsed electrical potentials to the working electrode, (1) a first conditioning potential, (2) a second detection and oxidative cleaning potential, and (3) a third reductive cleaning potential, said second potential being higher than said first and third potentials and said first potential being higher than said third potential; and (c) detecting the output from said working electrode during the time period of applying said second potential.

    摘要翻译： 在一个实施方案中，本发明涉及脉冲电化学检测方法，其包括（a）将包含至少一种分析物的液体样品流流过流通池中的工作电极; （b）向工作电极施加至少三个脉冲电势，（1）第一调节电位，（2）第二检测和氧化清洗电位，和（3）第三还原清洗电位，所述第二电位高于 说第一和第三个潜力，并说第一个潜力高于第三个潜力; 以及（c）在施加所述第二电位的时间段期间检测来自所述工作电极的输出。

    Isoconductive gradient ion chromatography
    8.
    发明授权
    Isoconductive gradient ion chromatography 失效
    等电离梯度离子色谱法

    公开(公告)号：US5132018A

    公开(公告)日：1992-07-21

    申请号：US729775

    申请日：1991-07-10

    申请人： William R. Jones ,  Allan L. Heckenberg ,  Petr Jandik

    发明人： William R. Jones ,  Allan L. Heckenberg ,  Petr Jandik

    IPC分类号： G01N30/34 ,  G01N30/96

    CPC分类号： G01N30/34 ,  G01N30/96

    摘要： An improved gradient ion chromatography process is disclosed. The process employs a gradient eluent which is maintained in a substantially isoconductive state throughout each sample run. By maintaining the gradient in an isoconductive state, conductivity detection and analysis of eluted analytes is enhanced.

    摘要翻译： 公开了改进的梯度离子色谱法。 该方法采用梯度洗脱液，其在每个样品运行中保持基本上不同的生理状态。 通过保持等离子体状态的梯度，增强了洗脱分析物的电导率检测和分析。

    Method for separating ionic species using capillary electrophoresis
    10.
    发明授权
    Method for separating ionic species using capillary electrophoresis 失效
    使用毛细管电泳分离离子物种的方法

    公开(公告)号：US5366601A

    公开(公告)日：1994-11-22

    申请号：US963685

    申请日：1992-10-20

    申请人： William R. Jones ,  Petr Jandik

    发明人： William R. Jones ,  Petr Jandik

    IPC分类号： B01D57/02 ,  G01N27/447

    CPC分类号： G01N27/44721

    摘要： A technique for separating, identifying and measuring ions in solution by capillary zone electrophoresis is described, which provides improved sensitivity and resolution of anionic species. The method involves introducing a sample containing the ionic species into a narrow bore capillary filled with a carrier electrolyte containing a selected light-absorbing anion. An electrical potential is applied across the capillary column causing the ions to elute according to their ionic mobility. Both UV absorbing and UV-transparent ions can be detected and quantitated by UV/visible photometric monitoring.

    摘要翻译： 描述了通过毛细管区带电泳分离，鉴定和测量溶液中的离子的技术，其提供阴离子物质的改进的灵敏度和分辨率。 该方法包括将含有离子物质的样品引入填充有选择的吸光阴离子的载体电解质的窄孔毛细管中。 在毛细管柱上施加电位，使离子根据其离子迁移率而洗脱。 UV /可见光度监测可以检测和定量UV吸收和UV透明离子。