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11.发明申请Resolution improvement in the coupling of planar differential mobility analyzers with mass spectrometers or other analyzers and detectors 有权平面差分移动分析仪与质谱仪或其他分析仪和检测器耦合的分辨率改进公开(公告)号：US20080251714A1
公开(公告)日：2008-10-16
申请号：US11786688
申请日：2007-04-11
IPC分类号： H01J49/02
CPC分类号： H01J49/004 , G01N27/622
摘要： Prior work on differential mobility analysis (DMA) combined with mass spectrometry (MS) has shown how to couple the output of the DMA with the inlet of an atmospheric pressure ionization mass spectrometer (APCI-MS). However, the conventional ion inlet to an APCI-MS is a round orifice, while conventional DMA geometries make use of elongated slits. The coupling of two systems with such different symmetries limits considerably the resolutions attainable by the DMA in a DMA-MS combination below the value of the DMA alone. The purpose of this invention is to overcome this limitation in the case of a parallel plate DMA. One solution involves use of an elongated rather than a circular MS sampling hole, with the long dimension of the MS inlet hole aligned with that of the DMA slit. Another involves use of a more elongated orifice in the DMA exit and a more circular hole on the MS inlet, the two being connected either through a short transfer conduit or through an ion guide. The DMAs described can also be coupled profitably to detectors and analyzers other than mass spectrometers.
摘要翻译： 差示迁移率分析（DMA）与质谱联用（MS）的先前工作已经显示了如何将DMA的输出与大气压电离质谱仪（APCI-MS）的入口耦合。 然而，APCI-MS的常规离子入口是圆形孔，而常规的DMA几何形状使用细长的狭缝。 具有这种不同对称性的两个系统的耦合大大限制了DMA-MS组合中DMA的可达到的分辨率低于单独的DMA值。 本发明的目的是在平行板DMA的情况下克服这个限制。 一个解决方案涉及使用细长而不是圆形的MS采样孔，其中MS入口孔的长尺寸与DMA狭缝的尺寸对齐。 另一个涉及在DMA出口中使用更细长的孔口，在MS入口上使用更多的圆形孔，两者通过短的传输管道或通过离子导向器连接。 所描述的DMA还可以有效地耦合到除质谱仪之外的检测器和分析仪。
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12.发明申请Method and apparatus for rapidly concentrating particles for analysis of explosives 审中-公开用于快速浓缩颗粒以分析爆炸物的方法和装置公开(公告)号：US20080206106A1
公开(公告)日：2008-08-28
申请号：US12012771
申请日：2008-02-05
CPC分类号： G01N1/2205 , G01N1/2208 , G01N27/622 , G01N2001/022
摘要： A fast alternative for detecting dangerous or illegal substances is taught that improves upon the relatively slow conventional batch method of collecting and concentrating particles in filters. The new method concentrates the particles on-line and almost instantaneously, taking advantage of their inertia. Particles are thus concentrated on the fly from a large gas sample flow rate into a small gas flow rate, where they are rapidly volatilized and their vapors sensed in an analytical instrument such as a mass spectrometer or an ion mobility spectrometer.
摘要翻译： 教导了一种用于检测危险或非法物质的快速替代方法，该方法改进了在过滤器中收集和浓缩颗粒的相对较慢的常规批次方法。 新方法利用它们的惯性将粒子集中在线并几乎瞬间。 因此，颗粒从大的气体样品流速飞行中集中到小的气体流速中，在那里它们被快速挥发，并且在诸如质谱仪或离子迁移谱仪的分析仪器中检测其蒸汽。
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公开(公告)号：US5873523A
公开(公告)日：1999-02-23
申请号：US808127
申请日：1997-02-28
CPC分类号： A61M15/02 , B05B5/0255 , B05B5/03 , Y10S977/904 , Y10S977/925
摘要： An electrospray apparatus incorporating the invention includes a capillary with an exit for ejecting a fluid, and an electrode positioned downstream from the exit. A gas source is used to establish a region of gas, at least immediately about the exit. A voltage supply creates a potential difference between the capillary exit and the electrode, the potential difference being sufficient to both establish a cone jet mode of operation at the exit of the capillary, to ionize the region of gas about the exit and create a current flow between the exit and the electrode. The current flow exhibits an increased value upon the gas becoming ionized, thus enabling detection of the establishment of a corona. This action creates a corona-assisted cone jet mode of electrospray operation which enables the fluid to disperse into highly uniform sized particles. The preferred gas is carbon dioxide.
摘要翻译： 结合本发明的电喷射装置包括具有用于喷射流体的出口的毛细管和位于出口下游的电极。 气源用于建立气体区域，至少在出口附近。 电压源产生毛细管出口和电极之间的电位差，电势差足以在毛细管出口处建立锥形喷射模式，以使出口周围的气体区域离子化并产生电流 在出口和电极之间。 电流在气体变得电离时表现出增加的值，从而能够检测电晕的建立。 该动作产生电晕辅助锥喷射模式的电喷操作，使得流体能够分散成高度均匀的粒子。 优选的气体是二氧化碳。
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