High-resolution beer volatile analysis method
US5402668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1994 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Feb 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/3084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is an apparatus and method for preparing volatiles collected from a sample for gas chromatographic analysis. Volatiles are collected from the sample in a volatile trap, such as a porous polymer trap. The volatile trap is then connected to a transfer line. The trap is heated to thermally desorb the volatiles, and an inert gas, such as helium, flows through the heated trap to transport volatiles through the transfer line into a capillary column located in a gas chromatograph oven. Inside of the oven, a portion of the capillary column is cooled with a cooling fluid such as liquid nitrogen to form a cold trap. When the cold trap is cooled, the desorbed volatiles are trapped in the cold trap. Then the cold trap is heated to allow the volatiles to be released and the volatiles are carried to the remainder of the capillary column for chromatographic analysis by an inert carrier gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.