Method of producing molecular profiles of isoparaffins by low emitter current field ionization mass spectrometry
US7671328B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Feb 6, 2007 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Jan 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/623
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is devoted to an analytical method for directly determining carbon number and molecular weight distributions of isoparaffin mixtures. The analytical means uses low in-scan emitter-current field-ionization mass spectroscopy to substantially reduced or eliminated molecular ion fragmentation for isoparaffins, which allows direct measurement of isoparaffin molecular ions for their distributions. The analytical means is capable of directly characterizing isobutane to C50+ isoparaffins, covering naphtha to gas oil ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.