Sensor for the selective detection of ammonia in no.sub.X -conta

Details Sensor for the selective detection of ammonia in no.sub.X -conta Sensor for the selective detection of ammonia in no.sub.X -conta

1998-02-02

2000-05-30

Warden, Jill

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

422 98, G01N 2712

Patent

active

060690135

ABSTRACT:
A sensor for selective detection of ammonia in high-oxygen, NO.sub.x -containing gas. The sensor has a component part acting as the capacitor, and a gas-permeable sensitive layer as the dielectric, the sensitive layer being a hydrophobic, precious-metal-free zeolite of low acidity which has an ordered crystalline structure of primary-pores whose diameter is of the magnitude of the gas-kinetic diameter of NH.sub.3.

REFERENCES:
patent: 4894142 (1990-01-01), Steigleder
patent: 4929581 (1990-05-01), Steinwandel et al.
patent: 5143696 (1992-09-01), Haas et al.
patent: 5782087 (1998-07-01), Kinugasa et al.
patent: 5879631 (1999-03-01), Wewers et al.

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