Composition, test device and method for determining the ionic st

Details Composition, test device and method for determining the ionic st Composition, test device and method for determining the ionic st

1981-03-23

1983-03-15

Smith, William F.

Chemistry: analytical and immunological testing

Process or composition for determination of physical state...

436169, 422 56, 422 57, G01N 936

Patent

active

043768270

ABSTRACT:
A composition is disclosed for determining the ionic strength or specific gravity of an aqueous test sample, the composition comprising a strongly acidic or strongly basic polyelectrolyte, a buffer substance capable of providing a pH of about 5.5, and an indicator means capable of producing a detectable response to ion exchange between the polyelectrolyte and the sample. The test device comprises a carrier matrix incorporated with the test composition, and the method for its use comprises contacting an aqueous test sample with the device and observing a detectable response.

REFERENCES:
patent: 3282650 (1966-11-01), Bannigan et al.
patent: 3447904 (1969-06-01), Rupe
patent: 3449080 (1969-06-01), Edwards
patent: 3598704 (1971-08-01), Dahlquist
patent: 3728226 (1973-04-01), Louderback
patent: 4076502 (1978-02-01), Dugle et al.
patent: 4092115 (1978-05-01), Rupe et al.
patent: 4318709 (1982-03-01), Falb et al.

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