公开(公告)号：US06604406B1

公开(公告)日：2003-08-12

申请号：US09917017

申请日：2001-07-26

申请人： Kevin L. Linker ,  Charles A. Brusseau ,  David W. Hannum ,  James G. Puissant ,  Nathan R. Varley

发明人： Kevin L. Linker ,  Charles A. Brusseau ,  David W. Hannum ,  James G. Puissant ,  Nathan R. Varley

IPC分类号： G01N100

CPC分类号： G01N1/24 ,  G01N1/40 ,  G01N1/405 ,  G01N21/76 ,  G01N2001/022 ,  G01N2015/0662

摘要： A preconcentrator system and apparatus suited to human portable use wherein sample potentially containing a target chemical substance is drawn into a chamber and through a pervious screen. The screen is adapted to capture target chemicals and then, upon heating, to release those chemicals into the chamber. Chemicals captured and then released in this fashion are then carried to a portable chemical detection device such as a portable ion mobility spectrometer. In the preferred embodiment, the means for drawing sample into the chamber comprises a reversible fan which, when operated in reverse direction, creates a backpressure that facilitates evolution of captured target chemicals into the chamber when the screen is heated. The screen can be positioned directly in front of the detector prior to heating to improve detection capability.

摘要翻译： 一种适用于人体便携式使用的预浓缩器系统和装置，其中潜在地含有目标化学物质的样品被吸入室中并通过透过屏。 屏幕适用于捕获目标化学物质，然后在加热时将这些化学物质释放到室内。 然后以这种方式捕获然后释放的化学品被携带到诸如便携式离子迁移谱仪的便携式化学检测装置。 在优选实施例中，用于将样品抽入腔室的装置包括可逆风扇，其在相反方向操作时产生背压，其有利于当加热筛网时捕获的目标化学物质进入腔室。 屏幕可以在加热之前直接放置在检测器的前面，以提高检测能力。