Diffusion through a membrane assaying apparatus and method

Details Diffusion through a membrane assaying apparatus and method Diffusion through a membrane assaying apparatus and method

1995-01-12

1996-06-11

Housel, James C.

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving antigen-antibody binding, specific binding protein...

7386323, 210634, 210640, 210641, 220502, 220529, 435 793, 4352872, 435810, 422 58, 422 61, 422101, 422102, 436164, 436165, 436172, 436177, 436178, 436514, 436536, 436538, G01N 33537, G01N 33558

Patent

active

055254756

ABSTRACT:
The diffusion through a membrane assaying apparatus and method facilitates rapid detection of small or larger molecular weight substances such as hazardous wastes, toxic chemicals or the like by using a semipermeable membrane having a predetermined molecular weight cutoff. The semipermeable membrane is provided as part of a container having a removable barrier which facilitates control of diffusion through the membrane. The assaying method includes the use of a reaction mechanism for detection of a predetermined substance. The reaction mechanism includes one or more reagents which are designed to either react or compete for a substance for which assaying is being performed. By selecting the proper reagents and molecular weight cutoff of the semipermeable membrane, the presence or absence of a reaction such as a color change or production of vapor provides indication whether the substance being assayed for is present in the test sample.

REFERENCES:
patent: 3948606 (1976-04-01), Johnson
patent: 4266021 (1981-05-01), Nylen et al.
patent: 4663126 (1987-05-01), Gould et al.
patent: 4865813 (1989-09-01), Leon

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