Dye-providing composition, diagnostic test kit and their use in method for ligand determination using peroxidase labeled-receptor
申请人:Johnson & Johnson Clinical Diagnostics, Inc.
公开号:EP0308236A2
公开(公告)日:1989-03-22
A dye-providing composition comprises a water-soluble or -dispersible polymer, such as a vinylpyrrolidone polymer, and an imidazole leuco dye capable of providing a dye in the presence of hydrogen peroxide and a peroxidative substance. The weight ratio of polymer to leuco dye is from 10,000:1 to 100:1. The dye-providing composition can be included with a peroxidase substrate in a diagnostic test kit. A method for the determination of a ligand can be carried out using a peroxidase labeled-receptor for the ligand and the dye-providing composition described above. The method is particularly useful for the determination of human chorionic gonadotropin.
Imidazole leuco dye composition containing 4'-hydroxyacetanilide diagnostic kit and method using same
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0347139A2
公开(公告)日:1989-12-20
A dye-providing composition is useful in various diagnostic assays wherein a peroxidase-labeled specific binding species is used. This composition is substantially free of peroxidase and such labeled species, and comprises an imidazole leuco dye and 4′-hydroxyacetanilide present in an amount up to 2.5 mmolar. This composition can be included as part of a diagnostic test kit.
Buffered wash composition, insolubilizing composition, test kits and method of use
申请人:Johnson & Johnson Clinical Diagnostics, Inc.
公开号:EP0431682A2
公开(公告)日:1991-06-12
A buffered aqueous composition is useful simultaneously as a wash solution and a dye-providing composition in specific binding assays involving enzyme-labeled specific binding reagents. The wash composition includes a dye-providing composition, a buffer and an organic solvent having a certain molecular weight and water-solubility. Another useful composition includes a particulate substrate having avidin attached thereto, and a peroxidase reducing agent. Either composition can be provided in a diagnostic test kit, and can be used to detect a
specific binding ligand in assays.
Use of 4' of 5'-hydroxy and 4'- or 5'-alkoxy-substituted electron transfer agents in compositions, elements, test kits and analytical methods
申请人:Johnson & Johnson Clinical Diagnostics, Inc.
公开号:EP0603953A1
公开(公告)日:1994-06-29
Aqueous compositions, test kits, test devices and methods can be used to detect hydrogen peroxide or peroxidase by generating a colorimetric or chemiluminescent signal in the presence of the analyte. Signal generation is enhanced by the presence of certain substituted 4-hydroxy- or 4-alkoxy-substituted phenyl or naphthyl electron transfer agents.
Analytical element and immunoassay using a 4-hydroxy or 4-alkoxyarylacetamide as stabilizer
申请人:Johnson & Johnson Clinical Diagnostics, Inc.
公开号:EP0603954A2
公开(公告)日:1994-06-29
A dry analytical element can be used to sensitively and rapidly detect a wide variety of specific binding ligands in either a competitive binding or sandwich assay format. The assays are carried out using a peroxidase-labeled immunoreactant. The peroxidase label is stabilized with a 4-hydroxy or 4-alkoxyarylacetamide which is located in one or more zones of the element. Not only is the label stabilized with the stabilizer, but the assay is more sensitive.