Test strips for the determination of the ionic strength or speci

Details Test strips for the determination of the ionic strength or speci Test strips for the determination of the ionic strength or speci

1997-07-07

1999-07-13

Alexander, Lyle A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 61, 436169, G01N 3348

Patent

active

059222832

ABSTRACT:
The ionic strength or the specific gravity of an aqueous test sample is determined by mixing the sample with a reagent composition on the test strips. The strips comprise a bibulous carrier containing an organic phosphonic acid, such as 1-hydroxyethlidene-1,1-diphosphonic acid and aminotris(methylenephosphonic acid), or inorganic phosphate having one of the structure formulas, ##STR1## where M stands for one equivalent of an alkali metal, ammonium, lower alkyl ammonium, or hydrogen ion, with the proviso that at least one of the M is hydrogen; x is an integer ranging from zero to two and y is also an integer ranging from zero to one, and serving to buffer the metal ions, and a chromogenic indicator capable of providing a detectable response of the ions being sequestered and coordinated within the complex in the mixture.

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