Device for detecting gases which must be treated before testing

Details Device for detecting gases which must be treated before testing Device for detecting gases which must be treated before testing

1987-07-02

1989-01-24

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

422103, 422 85, G01N 2105, G01N 2178

Patent

active

048000671

ABSTRACT:
A test tube with several reagent layers affecting the detection reaction, which are separated from one another by means of a permeable interlayer, is improved so that an undesired exchange of reaction products or reagents between the layers is prevented during the measurement process and also during the dwell time, i.e. before and after the measurement. To this end, the interlayer is provided with a valve unit that opens only during the flow.

REFERENCES:
patent: 3459508 (1969-08-01), Miczka
patent: 4329318 (1982-05-01), Le Grouyellec et al.

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