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公开(公告)号：US10023965B2
公开(公告)日：2018-07-17
申请号：US13593426
申请日：2012-08-23
摘要： Buffer generators are described based on electrodialytic devices. The methods of using these devices can generate buffers for diverse applications, including separations, e.g., HPLC and ion chromatography. Also provided are chromatographic devices including the buffer generators, generally located upstream from a chromatography column, sample injector valve or both.
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公开(公告)号：US09677999B2
公开(公告)日：2017-06-13
申请号：US14670269
申请日：2015-03-26
申请人： Purnendu K Dasgupta
发明人： Purnendu K Dasgupta
CPC分类号： G01N21/31 , G01N21/031
摘要： A system for increasing light throughput in cavity enhanced spectrometry, and a model for cavity enhanced absorption measurements are presented. The cavity has an entrance mirror, an opposed exit mirror and a detector positioned adjacent the exit mirror. An input aperture is defined in the entrance mirror to allow light from a source to enter the cavity. The input aperture improves light throughput without significant departure from the theoretically predicted amplification of absorbance. This results in improvement of detection limits, even with mirrors of modest reflectivity and inexpensive detectors.
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3.发明授权公开(公告)号：US07306720B2
公开(公告)日：2007-12-11
申请号：US10924236
申请日：2004-08-23
IPC分类号： B01D15/08
CPC分类号： G01N30/96 , B01D19/0031 , G01N30/34 , G01N2030/8423
摘要： In a liquid chromatographic system, removing at least part of a volatile component from the liquid sample stream after separation by flowing it through a volatile component-removal device including a porous wall having a surface coating of a permeable polymer less than 10 μm thick. A liquid chromatographic system suitable for performing the method. Also, a liquid chromatographic system in which volatile component is removed prior to separation across the same type of membrane or across a membrane made of a copolymer of perfluoro-2,2-dimethyl-1,3-dioxole.
摘要翻译： 在液相色谱系统中，通过将分离后的液体样品流中的挥发性成分的至少一部分流过挥发性成分除去装置，该挥发性成分除去装置包括具有小于10μm厚的可渗透聚合物的表面涂层的多孔壁。 适用于执行该方法的液相色谱系统。 而且，其中挥发性组分在分离过去相同类型的膜之前或通过由全氟-2,2-二甲基-1,3-二氧杂环戊烯的共聚物制成的膜上除去的液相色谱系统。
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公开(公告)号：US06332049B1
公开(公告)日：2001-12-18
申请号：US09490186
申请日：2000-01-22
申请人： Purnendu K. Dasgupta
发明人： Purnendu K. Dasgupta
IPC分类号： G02B600
CPC分类号： G01N21/76 , G01J3/4406 , G01N21/0303 , G01N21/05 , G01N21/645 , G02B2006/0325
摘要： A luminescence detector with a liquid-core waveguide. For detecting photoluminescence, the exciting radiation is provided transversely instead of axially, thus eliminating the need for monochromators and focusing optics. For detecting chemiluminescence, the chemiluminescent reagents are mixed in situ in the detector, thus eliminating time loss which results in loss of chemiluminescence. A further aspect of the invention is the electrogeneration of an unstable reagent for the production of chemiluminescence. The unstable reagent is generated in such a way that there is complete separation of anodic and cathodic products without the use of a physical barrier.
摘要翻译： 具有液芯波导的发光检测器。 为了检测光致发光，激发辐射横向而不是轴向地提供，因此不需要单色器和聚焦光学器件。 为了检测化学发光，化学发光试剂在检测器中原位混合，从而消除导致化学发光损失的时间损失。 本发明的另一方面是电生化用于生产化学发光的不稳定试剂。 产生不稳定的试剂，使得阳极和阴极产物完全分离而不使用物理屏障。
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5.发明授权
公开(公告)号：US5045204A
公开(公告)日：1991-09-03
申请号：US479446
申请日：1990-02-13
IPC分类号： G01N30/26 , B01D19/00 , B01D61/44 , B01D61/48 , G01N30/02 , G01N30/34 , G01N30/60 , G01N30/96
CPC分类号： B01D19/0031 , B01D61/44 , B01D61/48 , G01N30/34 , G01N2030/965 , G01N30/02
摘要： A method and apparatus has been provided for generating a high purity aqueous stream with selected ionic species--either cation (e.g. sodium) or anion (e.g. sulfate) and suitable for use as a chromatography eluent. In one form, an eluent generating means defines a source channel and a product channel separated by a permselective ion exchange membrane including exchangeable ions of the same charge as the selected ionic species. The membrane allows passage of ions of the same charge as the ionic species but is resistant to transmembrane passage of ions of opposite charge. Means is provided for applying an electrical potential between the source channel and product channel. In another form of the device, two different membranes define two source channels, a positively charged, anode source channel and a negatively charged cathode source channel, and a product channel. The effluent from the product channel is directed to the chromatographic separation means. Means is also provided for supplying liquid sample to the chromatographic separation means.
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公开(公告)号：US10814319B2
公开(公告)日：2020-10-27
申请号：US15395202
申请日：2016-12-30
IPC分类号： B01D15/20 , B01D15/22 , B01D15/36 , B01J20/286 , B01J20/32 , B01J39/26 , B01J41/20 , B01J47/02 , G01N30/60 , G01N30/96 , G01N30/56
摘要： Open tubular capillary columns for liquid and ion chromatography, based upon an ionically impermeable polyolefin capillary having a bore with a sulfonate-group- or amine-group-functionalized internal surface. The capillary columns may include a coating of ion exchanging nanoparticles electrostatically bound to the functionalized internal surface. The capillary columns may be made by exposing the interior surface to a sulfonating reagent comprising chlorosulfonic acid (ClSO3H), preferably from 85 wt % to 95 wt % chlorosulfonic acid at a process temperature of 20 to 25° C. The interior surface may be subsequently exposed to an asymmetrical diamine to form a sulfonic mid-linkage to the diamine, i.e., to form a sulfonamide-linked, amine-group-functionalized internal surface. The coating may be provided by subsequently exposing the interior surface to an aqueous suspension of ion exchanging nanoparticles to electrostatically bond the ion exchanging nanoparticles to the functionalized internal surface.
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公开(公告)号：US20180093262A1
公开(公告)日：2018-04-05
申请号：US15395202
申请日：2016-12-30
摘要： Open tubular capillary columns for liquid and ion chromatography, based upon an ionically impermeable polyolefin capillary having a bore with a sulfonate-group- or amine-group-functionalized internal surface. The capillary columns may include a coating of ion exchanging nanoparticles electrostatically bound to the functionalized internal surface. The capillary columns may be made by exposing the interior surface to a sulfonating reagent comprising chlorosulfonic acid (ClSO3H), preferably from 85 wt % to 95 wt % chlorosulfonic acid at a process temperature of 20 to 25° C. The interior surface may be subsequently exposed to an asymmetrical diamine to form a sulfonic mid-linkage to the diamine, i.e., to form a sulfonamide-linked, amine-group-functionalized internal surface. The coating may be provided by subsequently exposing the interior surface to an aqueous suspension of ion exchanging nanoparticles to electrostatically bond the ion exchanging nanoparticles to the functionalized internal surface.
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公开(公告)号：US09580822B2
公开(公告)日：2017-02-28
申请号：US13593441
申请日：2012-08-23
CPC分类号： C25B7/00 , B01D15/168 , B01D61/44 , B01D61/445 , B01D61/46 , B01D2311/18 , B01D2311/2653 , G01N30/34
摘要： An electrodialytic buffer generator is described. The buffer generator may include a central buffer-generating channel having an inlet and outlet, a second chamber, and a third chamber. The buffer-generating channel, the second chamber, and the third chamber may each include an electrode. The buffer generator may also include a first ion exchange barrier and a second ion exchange barrier. The first ion exchange barrier can be disposed between the second chamber and the buffer-generating channel. The second ion exchange barrier can be disposed between the third chamber and the buffer-generating channel.
摘要翻译： 描述电渗析缓冲发生器。 缓冲发生器可以包括具有入口和出口，第二室和第三室的中央缓冲产生通道。 缓冲产生通道，第二室和第三室可各自包括电极。 缓冲发生器还可以包括第一离子交换屏障和第二离子交换屏障。 第一离子交换屏障可以设置在第二室和缓冲产生通道之间。 第二离子交换屏障可以设置在第三室和缓冲产生通道之间。
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公开(公告)号：US20130048498A1
公开(公告)日：2013-02-28
申请号：US13593441
申请日：2012-08-23
CPC分类号： C25B7/00 , B01D15/168 , B01D61/44 , B01D61/445 , B01D61/46 , B01D2311/18 , B01D2311/2653 , G01N30/34
摘要： An electrodialytic buffer generator is described. The buffer generator may include a central buffer-generating channel having an inlet and outlet, a second chamber, and a third chamber. The buffer-generating channel, the second chamber, and the third chamber may each include an electrode. The buffer generator may also include a first ion exchange barrier and a second ion exchange barrier. The first ion exchange barrier can be disposed between the second chamber and the buffer-generating channel. The second ion exchange barrier can be disposed between the third chamber and the buffer-generating channel.
摘要翻译： 描述电渗析缓冲发生器。 缓冲发生器可以包括具有入口和出口，第二室和第三室的中央缓冲产生通道。 缓冲产生通道，第二室和第三室可各自包括电极。 缓冲发生器还可以包括第一离子交换屏障和第二离子交换屏障。 第一离子交换屏障可以设置在第二室和缓冲产生通道之间。 第二离子交换屏障可以设置在第三室和缓冲产生通道之间。
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公开(公告)号：US08293099B2
公开(公告)日：2012-10-23
申请号：US12039695
申请日：2008-02-28
CPC分类号： G01N30/96 , G01N30/64 , Y02E60/366
摘要： Apparatus and method for detecting current or potential generated in a liquid sample suitable for use in a chromatography or other liquid sample analytical system. One embodiment is an electrolytic ion transfer device with a signal detector in communication with the electrodes of the transfer device. Another is a combination ion transfer device/electrolyte generator. Another substitutes a detector for the ion transfer device in the combination.
摘要翻译： 用于检测适用于色谱法或其他液体样品分析系统的液体样品中产生的电流或电位的装置和方法。 一个实施例是具有与传送装置的电极连通的信号检测器的电解离子传递装置。 另一种是离子转移装置/电解质发生器的组合。 另外用组合的方式代替离子转移装置的检测器。
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