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    • 4. 发明申请
    • DENUDER ASSEMBLY FOR COLLECTION AND REMOVAL OF SOLUBLE ATMOSPHERIC GASES
    • 用于收集和清除可溶性大气气体的渗透装置
    • US20050045032A1
    • 2005-03-03
    • US10651057
    • 2003-08-27
    • Purnendu DasguptaKavin MorrisJianzhong Li
    • Purnendu DasguptaKavin MorrisJianzhong Li
    • B01D53/22G01N1/22G01N1/34B01D46/00
    • B01D53/228G01N1/2202G01N1/2214G01N1/2273G01N2001/2217G01N2001/4016G01N2015/0687
    • A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled with a sample gas source, a denuder liquid inlet fluidly coupled with a denuder liquid source, a barrier sheet extending across the internal cavity and separating the internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of the sample gas inlet, the barrier sheet having a liquid-reservoir surface and a gas-channel surface and being porous to gas and liquid; and a denuder liquid disposed in the liquid reservoir and permeating the barrier sheet to coat the gas-channel surface of the barrier sheet thereby allowing the denuder liquid on the gas-channel surface to contact the sample gas flowing within the gas flow-through channel and allowing the analyte to diffuse through the barrier sheet into the liquid reservoir. A method of using the denuder assembly for collection and removal of soluble atmospheric gases is also disclosed.
    • 一种分解器组件适于从样品气体中收集和去除气态分析物。 该分解器包括壳体,该壳体包括内部空腔,与样品气体源流体耦合的样品气体入口,与溶解液体源流体连接的分离液体入口,跨过内部空腔延伸的隔离层并将内部空腔分离成液体 所述阻挡片具有液体储存表面和气体通道表面,并且对于气体和液体是多孔的; 以及设置在所述液体储存器中并渗入所述阻挡片以将所述阻挡片的气体通道表面涂覆的剥离液,从而允许所述气体通道表面上的所述溶解液与所述气体流通通道内流动的样品气体接触, 允许分析物通过阻挡片扩散到液体储存器中。 还公开了一种使用该溶解气体组合件来收集和除去可溶性大气气体的方法。
    • 9. 发明授权
    • Electrophoresis with chemically suppressed detection
    • 电化学抑制检测
    • US5433838A
    • 1995-07-18
    • US258126
    • 1994-06-10
    • Purnendu DasguptaBao Li-Yuan
    • Purnendu DasguptaBao Li-Yuan
    • G01N27/26G01N27/447G01N30/60G01N30/96
    • G01N27/4473G01N2030/965
    • Improved capillary electrophoresis apparatus of the type that generally includes a capillary tube, the capillary tube having a sample inlet end and an outlet end, a first electrode in electrical communication with the inlet end of the capillary tube, a second electrode in electrical communication with the outlet end of the capillary tube and a high voltage power supply in electrical communication with the first and second electrodes. The improvement is to connect a miniature Ion Chromatography membrane suppressor to the outlet end of the capillary tube, to connect a conductivity detector to the membrane suppressor and to place the second electrode in the regenerant compartment of the membrane suppressor. The method embodiment of the invention for anion analysis includes the steps of: (a) separating anions of interest by capillary electrophoresis in a buffer solution; (b) exchanging cations of the buffer for regenerant cations using an ion chromatography membrane suppressor to reduce the electrical conductivity of the buffer to produce a suppressed buffer; and (c) measuring the electrical conductivity of the suppressed buffer to determine the separated anions. Similarly, the method embodiment of the invention for cation analysis includes the steps of: (a) separating cations of interest by capillary electrophoresis in a buffer solution; (b) exchanging anions of the buffer for regenerant anions using a stationary means for exchanging anions thereby reducing the electrical conductivity of the buffer to produce a suppressed buffer; and (c) measuring the electrical conductivity of the suppressed buffer to determine the separated cations.
    • 改进的毛细管电泳装置通常包括毛细管,毛细管具有样品入口端和出口端,与毛细管的入口端电连通的第一电极,与第一电极电连通的第二电极 毛细管的出口端和与第一和第二电极电连通的高压电源。 改进之处是将微型离子色谱膜抑制器连接到毛细管的出口端,将电导率检测器连接到膜抑制器上,并将第二电极放置在膜抑制器的再生室中。 用于阴离子分析的本发明的方法实施方案包括以下步骤:(a)通过毛细管电泳在缓冲溶液中分离感兴趣的阴离子; (b)使用离子色谱膜抑制剂交换用于再生阳离子的缓冲液的阳离子,以降低缓冲液的电导率以产生抑制缓冲液; 和(c)测量抑制缓冲液的电导率以确定分离的阴离子。 类似地,用于阳离子分析的本发明的方法实施例包括以下步骤:(a)通过毛细管电泳在缓冲溶液中分离目标阳离子; (b)使用用于交换阴离子的固定装置交换用于再生阴离子的缓冲液的阴离子,从而降低缓冲液的电导率以产生抑制缓冲液; 和(c)测量抑制缓冲液的电导率以确定分离的阳离子。