Control circuit for liquid chromatograph
US4450574A · kind A · utility
3Cited by
3References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D11/133
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for controlling the proportions of a plurality of solvents being introduced into a column of a liquid chromatograph. The circuit compensates for the compressibility of liquids by dividing the time during each pumping cycle during which the pump is delivering liquid to the column into a known number of intervals. A circuit responsive to the interval signals opens and closes solvent valves thereby allowing the solvents to be introduced into the pump in the desired proportions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.