Apparatus and method for measuring light absorption in small aqueous fluid samples
US5416879A · kind A · utility
86Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Water or some other aqueous fluid is employed as the light transmitting medium of a liquid-core fiber-optic wave guide employed as a spectrophotometer cell by employing, to define the core region, a polymer having a refractive index of less than 1.33. The light conducting channel defined by the aqueous fluid filled core may be a capillary or other suitably shaped vessel. The analysis of samples is accomplished by drawing a sample into the wave guide core region throughout the use of a fiber optic piston and thereafter delivering measurement light to the sample via the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.