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公开(公告)号：US06902701B1
公开(公告)日：2005-06-07
申请号：US09974327
申请日：2001-10-09
申请人： Robert C. Hughes , Ronald P. Manginell , Mark W. Jenkins , Richard Kottenstette , Sanjay V. Patel
发明人： Robert C. Hughes , Ronald P. Manginell , Mark W. Jenkins , Richard Kottenstette , Sanjay V. Patel
CPC分类号： G01N1/405 , G01N27/128 , Y10T29/49 , Y10T29/49002 , Y10T436/11 , Y10T436/25 , Y10T436/255
摘要： A chemical-sensing apparatus is formed from the combination of a chemical preconcentrator which sorbs and concentrates particular volatile organic chemicals (VOCs) and one or more chemiresistors that sense the VOCs after the preconcentrator has been triggered to release them in concentrated form. Use of the preconcentrator and chemiresistor(s) in combination allows the VOCs to be detected at lower concentration than would be possible using the chemiresistor(s) alone and further allows measurements to be made in a variety of fluids, including liquids (e.g. groundwater). Additionally, the apparatus provides a new mode of operation for sensing VOCs based on the measurement of decay time constants, and a method for background correction to improve measurement precision.
摘要翻译： 化学感测装置由吸收和浓缩特定的挥发性有机化学品（VOC）的化学预浓缩器和在浓缩预浓缩器被触发释放它们之后感测VOC的一个或多个化学电阻器的组合形成。 使用预浓缩器和化学电阻器组合使得可以以比单独使用化学电阻器可能的浓度更低的浓度检测VOC，并进一步允许在各种流体（包括液体（例如地下水））中进行测量， 。 此外，该装置提供了基于衰减时间常数的测量来检测VOC的新的操作模式，以及用于提高测量精度的背景校正方法。
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公开(公告)号：US06663697B1
公开(公告)日：2003-12-16
申请号：US10165862
申请日：2002-06-06
IPC分类号： B01D1508
CPC分类号： G01N30/6095 , G01N30/6065 , G01N2030/025
摘要： A new class of miniaturized gas chromatographic columns has been invented. These chromatographic columns are formed using conventional micromachining techniques, and allow packed columns having lengths on the order of a meter to be fabricated with a footprint on the order of a square centimeter.
摘要翻译： 已经发明了一类新型的小型气相色谱柱。 这些色谱柱是使用常规的微机械加工技术形成的，并允许以一平方厘米数量级的尺寸制造长度在一米的长度的填充柱。
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