Method for the removal of interfering substances in theophylline assays
US4477346A · kind A · utility
4Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Apr 22, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/94
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for the separation of theophylline and caffeine contained in body fluids is provided. A macroreticular styrene-divinylbenzene copolymer resin activated by a protic solvent is utilized. The body fluid is eluted with water in an isocratic manner to afford a theophylline sample uncontaminated with caffeine. Such samples are useful in immunoassay procedures for the measurement of theophylline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.