Method for identifying compounds in a chemical mixture
US6147344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1999 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Jan 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A technique for automatically analyzing mass spectrographic data from mixtures of chemical compounds is described consisting a series of screens designed to eliminate or reduce incorrect peak identifications due to background noise, system resolution, system contamination, multiply charged ions and isotope substitutions. The technique performs a mass spectrum operation on a control sample, producing a first group of output values. Next, perform a mass spectrographic operation on a sample to be analyzed, producing a second group of output values. Select a first m/z ratio for a material expected to be present in the mixture from a predetermined library of calculated mass spectrometer output spectrums and subtract the value of the control sample at the expected output value from the value of the analyzed sample, and compare the difference to a predetermined value. If the value is greater than the predetermined value thus indicating that the signal is above the background noise level, generating a record at that m/z value for an expected material. Performing the same mass spectrum operation several times to eliminate random noise and background contamination. Next, identify peak values…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.