Magnesium assay with calmagite or eriochrome black T reagents
US4383043A · kind A · utility
15Cited by
4References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Jul 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A colorimetric assay method and stabilized working reagents for the determination of magnesium in which an alkaline reagent containing a dye to complex magnesium reacts directly with the sample, requiring no protein-removal steps and no addition of substances to artificially correct for absorption differences of the metallized and free dye due to the presence of protein. The dye is either Calmagite or Eriochrome Black T. The reagent is buffered so that the pH is greater than about 9.0; the relative Van Slyke buffer value .beta.' of the reagent is greater than 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.