Preparation of diagnostic test strips containing tetrazolium salt indicators
US5360595A · kind A · utility
67Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an improved procedure for the manufacture of a diagnostic test device comprising a matrix having uniformly dispersed a tetrazolium salt and a reagent system designed to convert the tetrazolium to its colored formazan upon contacting the matrix with a fluid containing an analyte whose presence and/or concentration is being sought. The procedure involves applying the tetrazolium salt to the matrix from its solution in an organic solvent and, after drying, applying the reagent system to the matrix from its aqueous solution to which has been added hexanesulfonate as wetting agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.