Quartz crystal microbalance system for detecting concentration o

Details Quartz crystal microbalance system for detecting concentration o Quartz crystal microbalance system for detecting concentration o

1998-06-01

2000-12-05

Warden, Sr., Robert J.

Chemistry: analytical and immunological testing

Measurement of electrical or magnetic property or thermal...

436 55, 422 90, 422 62, 73 2406, G01N 2704, G01N 2902

Patent

active

061565784

ABSTRACT:
A quartz microbalance detector system for controlling the concentration of a gas component in a gas stream. The quartz microbalance interacts with the gas component, to effect a change in the oscillation frequency of the quartz microbalance detector and produce a signal correlative of concentration of the gas component in the gas stream. A specific embodiment includes a device for sensing concentration of a halogen-containing gas species in a gas stream, comprising a quartz microbalance detector having a quartz crystal with a surface functionalized with --OH functionality that reversibly reacts with the gas component to yield a bound reaction product on the surface that effects a change in the oscillation frequency of the quartz microbalance detector. The quartz microbalance may be utilized to maintain a set-point concentration of a gas compound in a multicomponent stream.

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