Use of phenol derivative in colorimetric analysis of metal ions
US5376552A · kind A · utility
4Cited by
6References
4Claims
0Family size
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Key dates
| Filing date | Nov 2, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Nov 2, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A phenol derivative obtained by reacting a carboxylic acid anhydride with a phenol compound, followed by condensation with iminodiacetic acid and formaldehyde, or a salt thereof is effective as an agent for adjusting color forming sensitivity in a colorimetric analysis of metal ions in a fluid such as a living body fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.