Laminated Detector for Detection and Quantitative Determination of Formaldehyde
First Claim
1. A sensitive reagent for the detection of aldehydes comprised of 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and a divalent, trivalent, or quadrivalent metal ion.
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Accused Products
Abstract
A multi-layered laminated test strip detector for formaldehyde is described which simplifies significantly the qualitative detection and quantitative determination of formaldehyde in aqueous solution or on the surface of wet solids. Layers of water soluble polymer are used to separate chemical reagents that otherwise will not be stable, and/or encapsulate the chemical reagents on bibulous material. Introducing the sample or wetting the detector through holes in a laminated encapsulating envelope permits the aqueous sample to dissolve the solid barrier when the sample is introduced and contact the reagents and the analyte, thereby forming color on the back side of the detector.
13 Citations
43 Claims
- 1. A sensitive reagent for the detection of aldehydes comprised of 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole and a divalent, trivalent, or quadrivalent metal ion.
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3. A detector consisting of multiple layers of bibulous material containing reagents tailored to detect aldehyde comprising:
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A. an efficacy layer, B. an oxidizing layer. C. a reagent layer containing a hydrazine-based chromogene, and, D. an encapsulating envelope that; a. keeps all the layers together, b. facilitates the introduction of an aqueous sample into the detector from specific locations, entry ports, so that the liquid will wet the various layers in a specific pattern and order. and, c. help keep the locations that color is formed in specific locations relative to the edges of the detector to facilitate visual and electronic color comparison and quantification. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification