Detection systems and dopants

Details Detection systems and dopants Detection systems and dopants

2006-05-12

2010-10-26

Berman, Jack I (Department: 2881)

Radiant energy

Ionic separation or analysis

Methods

C250S281000, C436S056000, C436S106000, C436S127000, C436S130000, C436S171000, C436S173000, C436S181000

Reexamination Certificate

active

07820962

ABSTRACT:
An ion mobility spectrometer has a drift chamber (1) with an inlet (2) at one end by which a gas or vapor being analyzed is supplied to the chamber. After ionization, molecules are admitted through a gate8and flow along a drift region (9) to a collector plate (11). A drift gas is flowed through the drift region against the flow of ionized molecules and is circulated along a flow path (31, 32, 40) and (30), which includes a chamber (50) including a dopant. The dopant is 2,4-pentanedione, which has been found to enhance the detection of a number of compounds especially toxic industrial chemicals and nitrogen compounds, such as those present in the breath of mammals.

REFERENCES:
patent: 2004/0043497 (2004-03-01), Feuer et al.
Buckley et al., “Mass Spectrometric Determination of a Stable Isotope Tracer for Copper in Biological Materials”, Mar. 1982, Anal Chem, vol. 54, No. 3, pp. 504-510.

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