TESTING APPARATUS DETERMINING IONIC POWER OR SPECIFIC MASS OF TESTED LIQUID SAMPLE AND METHOD THEREFOR

A system for determining the ionic strength or specific gravity of an aqueous test sample comprises a weakly acidic or weakly basic polyelectrolyte which is at least partially neutralized, and an indicator means capable of producing a detectable response to ion exchange between the polyelectrolyte a...

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Bibliographic Details
Main Authors WHITE-STEVENS RODRIC H.,US, WHITE WILLIAM I.,US, STISO SISTO N.,US, WANG YUNGYUNG,TW, FALB RICHARD D.,US
Format Patent
LanguageEnglish
Published 13.12.1989
Edition4
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:A system for determining the ionic strength or specific gravity of an aqueous test sample comprises a weakly acidic or weakly basic polyelectrolyte which is at least partially neutralized, and an indicator means capable of producing a detectable response to ion exchange between the polyelectrolyte and the sample. A test device comprises a carrier matrix incorporated with a test composition comprising the polyelectrolyte, and the method for its use comprises contacting an aqueous test sample with the device and observing a detectable response, for example a colour change of an indicator such as bromothymol where originally included in the device, or a change in pH measured using a flat surface electrode.
Bibliography:Application Number: CS19790007556