Test strip for free chlorine analysis

Details Test strip for free chlorine analysis Test strip for free chlorine analysis

1994-06-03

1996-02-13

Redding, David A.

Chemistry: analytical and immunological testing

Halogen containing

In aqueous solution

436169, 436810, 436904, 435 4, 435 14, 435805, 427 213, 422 56, G01N 3300

Patent

active

054910943

ABSTRACT:
A colorimetric test strip useful for analysis of free chlorine is provided. In a preferred embodiment, 3,3',5,5'-tetramethylbenzidine is the colorimetric indicator. Beneficially, the carrier for the indicator has been treated to have a pH that eliminates chloramine interference. Advantageously, the indicator in free base form and a suitable water-soluble buffer may be deposited on the carrier using a combined solution of indicator and buffer.

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patent: 5187100 (1993-02-01), Matzinger et al.
Standard Methods for the Examination of Water and Wastewater, 18th Ed. 1992, pp. 4-36, 4-37, 4-47.
Ultra+ Blood Glucose Monitoring Test Strips, Directions for Use, Apr. 1992.

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