Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving oxidoreductase
Patent
1999-02-23
1999-11-02
Leary, Louise N.
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving oxidoreductase
435 4, 4352831, 436 63, C12Q 128, C12Q 100
Patent
active
059768231
ABSTRACT:
A composition, method, and test device for determining a low concentration of total available chlorine concentration in 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 about 2 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) an optional surfactant, (d) a catalyst, and (e) a 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 source water for a hemodialysis unit.
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Integrated Biomedical Technology Inc.
Leary Louise N.
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