http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2122153-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_29fc302ba4149ae749f27cb28fc99f1a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-428 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-4215 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-42 |
| filingDate | 1992-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_444f7abdb1d394749157d60af0b27d47 |
| publicationDate | 1993-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2122153-A1 |
| titleOfInvention | Mass spectrometry method using time-varying filtered noise |
| abstract | A method for performing mass analysis with dynamic mass resolution, in which a time-varying notch filtered broadband voltage signal (sometimes denoted as a time-varying "filtered noise" signal) is applied to a quadrupole mass filter (11-14). The time-varying filtered noise signal (22) can consist of a rapid sequence of static (time-invariant) filtered noise signals, each defining a notch having a selected width and center location. The invention facilitates performance of mass analysis over a wide range of ion mass-to-charge ratios ("mass ranges") with adequate mass resolution. By appropriately choosing the width of each notch in the applied time-varying filtered noise, mass analysis can be performed with substantially constant mass separation over a wide mass range. In order to maintain substantially constant mass separation while analyzing a selected consecutive or non-consecutive sequence of ions (by passing such sequence of ions through the mass filter), the applied filtered noise (22) should have narrower notches at times when ions with higher mass-to-charge ratio are to be selected, and wider notches at times when ions with lower mass-to-charge ratio are to be selected. |
| priorityDate | 1991-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 16.