Method and apparatus for testing materials for levels of agents

Details Method and apparatus for testing materials for levels of agents Method and apparatus for testing materials for levels of agents

1976-01-19

1976-09-21

Monacell, A. Louis

Textiles: fiber preparation

195127, 195139, C12K 100

Patent

active

039817776

ABSTRACT:
Method of and apparatus for testing materials for levels of agents that are toxic and/or inhibitory to microorganisms involving (a) the mixing of a sample of said material with a liquid medium containing microorganisms, said medium being capable of supporting growth of said microorganisms; (b) the impregnating of the resulting liquid mixture into a porous inert support mass capable of permitting oxygen transfer from ambient gas enveloping said mass to said mixture impregnated into it; (c) the incubating of said mixture impregnated into said mass for a period of time and under conditions sufficient to promote bacterial growth therein in the absence of toxic or inhibitory agents; (d) the removing of the incubated mixture from said inert support mass and filtering same through an open pore filter; and (e) the observing of the degree of turbidity, or lack of it, in the resulting filtrate. In particular, the apparatus of the invention comprises (1) a plurality of closed test reactors; (2) a porous inert support mass disposed within each said reactor and capable of being impregnated with a liquid test mixture and permitting transfer of oxygen from ambient oxygen-containing gas enveloping said mass to said mixture; and (3) a closed source of oxygen connected to said closed test reactor to provide oxygen thereto.

REFERENCES:
patent: 2990339 (1961-06-01), Frank et al.
patent: 3504185 (1970-03-01), Zweig et al.
patent: 3751340 (1973-08-01), Witz
patent: 3846243 (1974-11-01), Fletcher
patent: 3881993 (1975-05-01), Frecke et al.

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