Peroxide and chlorine test strip
First Claim
1. A composition capable of exhibiting a detectable and measurable color transition in response to an oxidant concentration of 0.0% to greater than 4%, by weight, said composition comprising:
- (a) an iodide salt;
(b) a buffer;
(c) a water-soluble polymer; and
(d) a carrier comprising water,wherein the composition has a pH of about 2 to about 9.
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Accused Products
Abstract
A composition, method, and test device for quantitatively determining the oxidant concentration 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 interacting with an oxidant to produce a detectable and measurable response for oxidant over a wide concentration range of oxidant. An indicator reagent composition contains: (a) an iodide salt, (b) a buffer, and (c) a water-soluble polymer, preferably a cellulose-based polymer. An indicator reagent composition is incorporated into a carrier matrix, like filter paper, to provide a test pad useful in a dry phase oxidant assay of a test sample, especially for test samples containing a high concentration of oxidant, like chlorine or a peroxide.
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Citations
34 Claims
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1. A composition capable of exhibiting a detectable and measurable color transition in response to an oxidant concentration of 0.0% to greater than 4%, by weight, said composition comprising:
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(a) an iodide salt; (b) a buffer; (c) a water-soluble polymer; and (d) a carrier comprising water, wherein the composition has a pH of about 2 to about 9. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of determining a chlorine content of an aqueous test sample containing 0 to 10,000 ppm chlorine, said method comprising:
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(a) contacting the aqueous test sample with an indicator reagent composition comprising; (i) an iodide salt, (ii) a buffer, (iii) a water-soluble polymer, and (iv) a carrier comprising water, (b) determining the chlorine content of the aqueous test sample from the intensity and degree of a color transition of the indicator reagent composition. - View Dependent Claims (27, 28, 29, 30)
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31. A method of quantitatively determining the oxidant content of an aqueous sample containing 0 to about 10,000 ppm oxidant, said method comprising:
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(a) contacting the aqueous sample with an analyte detection device comprising a test pad, said test pad having incorporated therein an indicator reagent composition comprising; (i) an iodide salt, (ii) a buffer, (iii) a water-soluble polymer, and (iv) a carrier comprising water, (b) determining the oxidant content of the aqueous sample from the intensity and degree of a color transition of the indicator reagent composition. - View Dependent Claims (32)
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33. A method of determining the oxidant content of an aqueous sample comprising:
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(a) contacting the aqueous sample with an analyte detection device comprising a test pad having incorporated therein; (i) an iodide salt, (ii) a buffer, (iii) a water-soluble polymer, and (iv) a carrier comprising water, (b) examining the analyte detection device for a color transition; and (c) correlating the color transition to the oxidant content of the aqueous sample. - View Dependent Claims (34)
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Specification