Analytical element
First Claim
1. An analytical element for determining the presence of a component in a liquid sample comprising:
- (a) a light-transmissive and liquid-impermeable support;
(b) at least one reagent layer containing at least one reagent reactive with said component and containing a hydrophilic colloid; and
(c) at least one hydrophobic developing layer having a fibrous structure and being positioned on the side of said reagent layer opposite to said support whereby the component in said liquid sample permeates through said developing layer toward said reagent layer, said developing layer formed by coating said reagent layer with a homogeneous dispersion comprising a hydrophobic organic macromolecular polymer having reactive groups and a fibrous material.
2 Assignments
0 Petitions
Accused Products
Abstract
An analytical element which comprises (a) a light-transmissive and liquid-impermeable support, (b) at least one reagent layer containing at least one reagent reactive with a component in a liquid sample and being constituted of a hydrophilic colloid, and (c) at least one developing layer of a fibrous structure being positioned on said reagent layer on the side opposite to said support for permitting the component in said liquid sample to permeate therethrough toward said reagent layer and having been formed by coating said reagent layer with a dispersion comprising an organic macromolecular polymer having reactive groups and a fibrous material.
-
Citations
17 Claims
-
1. An analytical element for determining the presence of a component in a liquid sample comprising:
-
(a) a light-transmissive and liquid-impermeable support; (b) at least one reagent layer containing at least one reagent reactive with said component and containing a hydrophilic colloid; and (c) at least one hydrophobic developing layer having a fibrous structure and being positioned on the side of said reagent layer opposite to said support whereby the component in said liquid sample permeates through said developing layer toward said reagent layer, said developing layer formed by coating said reagent layer with a homogeneous dispersion comprising a hydrophobic organic macromolecular polymer having reactive groups and a fibrous material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. An analytical element for determining the presence of a component in a liquid sample comprising:
-
(a) a light-transmissive and liquid-impermeable support selected from cellulose acetates, polyethyleneterephthalates, polycarbonates and polystyrenes; (b) at least one reagent layer containing at least one reagent reactive with said component and containing a hydrophilic colloid selected from the group consisting of gelatins, gelatin derivatives, polyvinyl alcohols and polyvinyl pyrrolidones, said hydrophilic colloid having a film thickness of at least about 5 microns; and (c) at least one hydrophobic developing layer having a fibrous structure and being positioned on the side of said reagent layer opposite to said support whereby the component in said liquid sample permeates through said developing layer toward said reagent layer, said developing layer formed by coating said reagent layer with a homogeneous dispersion comprising a hydrophobic organic macromolecular polymer having reactive groups and a fibrous material, said hydrophobic organic macromolecular polymer consisting essentially of a copolymer having at least one monomer having reactive groups and at least one monomer selected from the group consisting of;
##STR3## wherein each of R1 and R2, which can be the same or different, is a non-interfering substituent selected from a hydrogen atom, a halogen atom, and a substituted or unsubstituted amino-free alkyl or aryl group having 1 to 10 carbon atoms and R3 is selected from a hydrogen atom, a halogen atom, or a substituted or unsubstituted, amino-free aliphatic or aromatic group having 1 to 10 carbon atoms;(II)
space="preserve" listing-type="equation">CHR.sup.6 ═
CR.sup.4 -COOR.sup.5wherein R6 has the same meaning as R1 in formula (I), R4 is selected from the group consisting of a hydrogen atom and a methyl group and R5 is selected from the group consisting of an aryl, an alkyl, an alkaryl and aralkyl group, each having 1 to 10 carbon atoms; (III) polymerizable unsaturated nitrile monomers; and (IV) interparticle crosslinking monomers having two addition-polymerizable groups, wherein the monomer having reactive groups is present in an amount of 0.1 to 30% by weight based on said hydrophobic organic macromolecular polymer.
-
Specification