Analytical element
First Claim
1. An analytical element, comprising a light-transmissive and liquid-impervious support, at least one reagent layer comprising a hydrophilic colloid containing at least one reagent which reacts with a component in a liquid sample, and at least one development layer having a fibrous structure provided at a position on a side of the reagent layer opposite to that of said support for permitting the component in said liquid sample to permeate into said reagent layer, said development layer having a fibrous structure being formed by coating said reagent layer with a dispersion of fibers wherein said fibers have a size of 50 to 325 mesh.
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Accused Products
Abstract
There is presented an improved simple quantitative analytical element for analysis of components in a body fluid such as blood, having a reagent layer constituted of a hydrophilic colloid containing at least one reagent reactive with a component in a liquid sample provided on a support, and also a development layer of a fibrous structure on the reagent layer on the opposite side to the support. A liquid sample can be distributed uniformly through the reagent layer to enable quantitative analysis.
25 Citations
15 Claims
- 1. An analytical element, comprising a light-transmissive and liquid-impervious support, at least one reagent layer comprising a hydrophilic colloid containing at least one reagent which reacts with a component in a liquid sample, and at least one development layer having a fibrous structure provided at a position on a side of the reagent layer opposite to that of said support for permitting the component in said liquid sample to permeate into said reagent layer, said development layer having a fibrous structure being formed by coating said reagent layer with a dispersion of fibers wherein said fibers have a size of 50 to 325 mesh.
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15. An analytical element comprising a light-transmissive and liquid-impervious support, at least one reagent layer comprising a hydrophilic colloid selected from the group consisting of gelatin, gelatin derivatives, polyvinyl alcohol and polyvinyl pyrrolidone, having a thickness of at least 5 microns, and at least one reagent which reacts with a component in a liquid sample, and at least one development layer having a fibrous structure, the fibers of said fibrous structure having a size of 50 to 325 mesh and being selected from natural cellulose and derivatives thereof, polyethylene, polypropylene and polyamide, said development layer being provided at a position on a side of the reagent layer opposite to that of said support for permitting the component in said liquid sample to permeate into said reagent layer, said development layer being formed by coating said reagent layer with a dispersion comprising and fibers and a surfactant.
Specification