Format for immunoassay in thin film
US5958339A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1992 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Aug 31, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/525
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a novel dry analytical element for determination of an analyte in a fluid sample in thin film immunoassay, particularly chemiluminescence, fluorescence and colorimetry immunoassay. There is provided an analytical element comprising a support member, a reagent matrix comprised of at least one layer of a porous material carried on the support member, the matrix including a read area, an absorbent material in contact with the matrix, and light absorbing or reflecting means integral to the absorbent material and/or positioned between the absorbant material and the read area for absorbing or blocking background signal generated by washed, removed label and other interferents from outside the read area prior to it moving back into the read area. The analytical element can comprises a cover depending on the type of immunoassay to be conducted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.