Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving oxidoreductase
Patent
1998-02-18
1999-03-30
Leary, Louise N.
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving oxidoreductase
435 4, 435970, 435968, 436124, 436125, C12Q 128, C12Q 100, G01N 3353
Patent
active
058887580
ABSTRACT:
A composition, method, and test device for determining the total available chlorine concentration, and the relative amounts of free and bound chlorine, of a test sample are disclosed. The test device includes a test pad having a suitable carrier matrix incorporating an indicator reagent composition capable of converting combined available chlorine to free available chlorine and of interacting with free available chlorine to produce a detectable and measurable response for total available chlorine over a range of 0 to over 5000 ppm total available chlorine in the test sample. An indicator reagent composition contains: (a) an indicator dye that is responsive to free available chlorine, such as tetramethylbenzidine, (b) a buffer, (c) a surfactant, (d) an optional catalyst, and (e) an optional polymer. An indicator reagent composition is incorporated into a carrier matrix, like filter paper, to provide a test pad useful in a dry phase total available chlorine assay of a test sample, such as a sanitizing solution for a hemodialysis unit.
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Integrated Biomedical Technology Inc.
Leary Louise N.
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