Stable reagent for ferric ion complex indicator systems
US5639631A · kind A · utility
1Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12Q1/26
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The invention is a stable reagent used in assay systems that form a colored ferric ion complex, such as Prussian Blue. Such reagents are useful for the detection or measurement of an analyte from a fluid sample. Surprisingly, it has been found that the inclusion of certain ferric ion chelating agents, such as 3-sulfobenzoic acid, will inhibit formation of the blank reaction in the reagent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.