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公开(公告)号：US20230271117A1
公开(公告)日：2023-08-31
申请号：US18314929
申请日：2023-05-10
申请人： DIONEX CORPORATION
发明人： Weichiat Chen , Kannan Srinivasan
CPC分类号： B01D29/96 , B01D46/2414 , B01D2201/0415 , B01D2201/291 , B01D2201/34 , B01D2271/027
摘要： An extraction cell cap assembly allows for toolless disassembly. The assembly includes a cap body having a threaded base releasably engaged with a cell vessel, a support member extending axially upward from the base, and a bore axially extending through the support member. The assembly also includes a locking cap having a plunger slidably received within the bore, a recess disposed within the plunger, and a locking portion that releasably engages the support member. Rotation of the locking cap in a first direction engages the locking portion with the support member, and rotation in an opposite direction disengages the locking portion. A filter is received in the recess and a seal member received in the bore, wherein the seal member forms a fluid-tight seal between the cell vessel and the assembly when the locking portion and the support member are engaged and the assembly is secured to the cell vessel.
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公开(公告)号：US20180149629A1
公开(公告)日：2018-05-31
申请号：US15824962
申请日：2017-11-28
摘要： Systems, methods and devices are taught for providing analytical methods for peak-shaped responses separated in time or space, including quantitation of chromatographic peaks based on a width measurement of a peak trace at a selected height as a quantitation element. Methods of treating a peak trace as a composition of exponential functions representing a leading and a trailing end are included. Methods that facilitate the detection of impurities in peak trace outputs are also included.
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公开(公告)号：US09739692B2
公开(公告)日：2017-08-22
申请号：US14671715
申请日：2015-03-27
申请人： DIONEX CORPORATION
CPC分类号： G01N1/34 , B01D11/0203 , B01D11/0207 , B01L3/52 , B01L3/561 , B01L3/567 , B01L2200/026 , B01L2200/0631 , B01L2400/0487 , B01L2400/06 , B01L2400/082
摘要： Apparatus for extracting organic analytes from a sample comprising a first compressed gas source connected to valving and a sample extraction cell connected to the valving. A pressure regulator is connected to the extraction cell outlet to the pressure regulator. The pressure regulator blocks fluid flow when the pressure at the pressure regulator inlet is below a predetermined pressure and permits fluid flow when above said predetermined pressure. The apparatus is free of operative association with a mechanical pump or with a compressed gas source other than the compressed gas source. An extraction method for using the above apparatus is described.
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公开(公告)号：US09400268B2
公开(公告)日：2016-07-26
申请号：US14455710
申请日：2014-08-08
申请人： DIONEX CORPORATION
CPC分类号： G01N30/96 , B01D15/361 , G01N2030/965
摘要： An electrolytic method for suppressing liquid eluent containing previously separated sample analyte anions, counterions to the sample anions, and non-sample anions suppressible to weak acids in an electrolytic device comprising a housing defining at least a sample stream flow channel and an ion receiving flow-through channel separated by an ion exchange bather. The sample stream flow channel includes an upstream channel portion and a downstream channel portion. A first current is applied across the upstream channel portion for substantially completely suppression. A second current is applied across the downstream channel portion at a magnitude of less than 10% of the magnitude of the first current.
摘要翻译： 一种用于抑制液体洗脱液的电解方法，其包含预先分离的样品分析物阴离子，对样品阴离子的抗衡离子和在电解装置中可被弱酸抑制的非样品阴离子，该电解装置包括限定至少样品流流动通道和离子接收流动通道的壳体， 通过通道由离子交换器分离。 样本流流通道包括上游通道部分和下游通道部分。 跨越上游通道部分施加第一电流以实质上完全抑制。 第二电流以小于第一电流幅度的10％的幅度跨越下游沟道部分施加。
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公开(公告)号：US20150306518A1
公开(公告)日：2015-10-29
申请号：US14260095
申请日：2014-04-23
申请人： DIONEX CORPORATION
发明人： Kannan Srinivasan
CPC分类号： B01D15/367 , B01D15/361 , B01D61/44 , C25F1/00 , C25F7/00 , G01N30/28 , G01N30/96 , G01N2030/965
摘要： An electrolytic device comprising a housing includes at least first and second adjacent liquid flow-through channels. A bather impermeable to ion flow and to bulk liquid flow is disposed between the first and second channels. A first electrode assembly is disposed adjacent to one end of the channels and a second electrode assembly is disposed adjacent the other end of the channels.Also, a contaminant removal method using the above electrolytic device. A first aqueous stream including contaminants flows through the first channel while passing a current between the first and second electrode assemblies to remove contaminants. Effluent from the first channel flows, with or without further treatment, through the second channel while passing current between said first and second electrode assemblies to remove further contaminants.
摘要翻译： 包括壳体的电解装置包括至少第一和第二相邻的液体流通通道。 在第一和第二通道之间设置有不可透过离子流和散装液体流动的浴衣。 第一电极组件邻近通道的一端设置，并且第二电极组件邻近通道的另一端设置。 另外，使用上述电解装置的污染物去除方法。 包含污染物的第一含水流在第一和第二电极组件之间通过电流同时流过第一通道以除去污染物。 来自第一通道的流出物在有或没有进一步处理的情况下通过第二通道流动，同时在所述第一和第二电极组件之间通过电流以除去更多的污染物。
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公开(公告)号：US11466373B2
公开(公告)日：2022-10-11
申请号：US15990043
申请日：2018-05-25
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：US11332391B2
公开(公告)日：2022-05-17
申请号：US16396527
申请日：2019-04-26
申请人： DIONEX CORPORATION
摘要： A method, device, and system for removing a volatile component from a liquid solution for a chromatographic separation are described. The method includes the flowing of a liquid solution through a first chamber of the device. A volatile component in the liquid solution is transported across a first ion exchange barrier from the first chamber to a second chamber. The first ion exchange barrier has a first charge. The second chamber includes an ion exchange packing having a second charge that is an opposite polarity to the first charge. The volatile component reacts with the ion exchange packing to create a charged component in the second chamber. The charged component having a third charge that is a same polarity to the first charge. The ion exchange packing is regenerated by electrolytically generating a hydronium or a hydroxide.
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公开(公告)号：US11243194B2
公开(公告)日：2022-02-08
申请号：US16258285
申请日：2019-01-25
申请人： DIONEX CORPORATION
IPC分类号： G01N30/96
摘要： A suppressor for use in reducing a background signal while detecting analytes in a liquid sample for ion chromatography is described. The suppressor includes a central channel and two flanking regenerant channels. The central channel is formed with an eluent channel plate including a central cutout portion having a peripheral boundary portion. The peripheral boundary portion includes a recessed eluent plate height that is less than the eluent plate height. The peripheral boundary portion includes two or more notches or protrusions. An eluent screen is disposed in the central cutout portion, in which a peripheral border of the eluent screen has two or more corresponding notches or corresponding protrusions to the eluent channel plate.
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公开(公告)号：US11123655B2
公开(公告)日：2021-09-21
申请号：US13765948
申请日：2013-02-13
申请人： Dionex Corporation
发明人： Kannan Srinivasan , SM Rahmat Ullah
摘要： A parallel accelerated solvent extraction system includes a plurality of extraction cells, a temperature controlled zone for maintaining the plurality of extraction cells at a desired temperature, a plurality of collection vessels, each fluidly coupled to a respective extraction cell via a flow restrictor configured to maintain a pressure, a solvent pump for supplying extraction solvent to the plurality of extraction cells, and a switching valve for sequentially directing extraction solvent flowing from the solvent pump to respective ones of the plurality of extraction cells. A method of parallel accelerated solvent extraction is also disclosed.
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公开(公告)号：US11105782B2
公开(公告)日：2021-08-31
申请号：US15729480
申请日：2017-10-10
申请人： DIONEX CORPORATION
摘要： Systems and methods for inhibiting translocation of ions across ion exchange barriers include an eluent generator having an ion source reservoir with a first electrode, an eluent generation chamber with a second electrode, an ion exchange barrier disposed therebetween, and means for reversing the polarity of a voltage or current applied across the first and second electrodes. A first polarity voltage or current applied across the electrodes generates an electric field that promotes translocation of eluent counter ions from the reservoir across the barrier, where the counter ions combine with eluent ions electrolytically generated in the chamber. By reversing the polarity of the voltage or current across the electrodes, the resulting electric field inhibits translocation of counter ions across the barrier from the reservoir into the chamber. Reverse voltage or current bias reduces counter ion concentration in the resting chamber to prevent exhaustion of ion suppressor capacity during start up.
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