Analytical method for detecting fuel markers
US9689859B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 2, 2014 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | May 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/8854
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas chromatographic method for detecting a first marker and a second marker in a fuel in two channels: (i) a first capillary column coated with polysiloxane and a second capillary column coated with polyethylene glycol; and (ii) a third capillary column coated with polymethylphenylsiloxane and a fourth deactivated capillary column. The steps are: (a) introducing a first sample into the first column to produce a first effluent; (b) introducing only a portion of the first effluent into the second column to produce a second effluent; (c) allowing the second effluent to pass through a mass spectrometer; (d) introducing a second sample into the third column to produce a third effluent; (e) introducing only a portion of the third effluent into the fourth column to produce a fourth effluent; (f) allowing the fourth effluent to pass through a mass spectrometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.