Mount for ammonia-sensitive test elements

Details Mount for ammonia-sensitive test elements Mount for ammonia-sensitive test elements

1985-12-24

1988-01-12

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 57, 422 58, 422104, 435 12, 435805, 436113, 436165, G01N 3122, G01N 3350, C12Q 158

Patent

active

047190850

ABSTRACT:
There is described a dry chemistry test element consisting of a chemistry unit and a mount that is ammonia-sensitive, wherein the mount is improved to prevent ammonia carry-over from test element to test element. The improvement is based upon the discovery that in previous test elements which were joined together using ultrasonic bonding along energy-directing ribs, ammonia carry-over was created by the leakage of ammonia from one ammonia-sensitive element to another test element. Each element had a construction of a mount that provided a gas leakage path into the viewing aperture of the bottom sheet of the mount. The elements of the invention are provided with a smooth area on the bottom sheet which is fixed to the chemistry unit with an adhesive while the rest of the mount is joined at the energy-directing ribs.

REFERENCES:
patent: 4223089 (1980-09-01), Rothe et al.
patent: 4298345 (1981-11-01), Sodickson et al.
patent: 4440301 (1984-04-01), Intengan
patent: 4564503 (1986-01-01), Greisch

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