http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7038199-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3a220d41e1067949aaaa660e351682be |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 |
| filingDate | 2004-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2006-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f872733248da12bdc0422772ddd0520 |
| publicationDate | 2006-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-7038199-B2 |
| titleOfInvention | Apparatus and method for elemental mass spectrometry |
| abstract | A mass spectrometer and method of mass spectrometry in which polyatomic and doubly charged ion interferences are attenuated by establishing an electron population through which a beam of particles containing elemental sample ions and the interfering ions is passed such that the interfering ions preferentially undergo ion-electron recombination and thus dissociation to remove a significant number of the interfering ions. Means ( 30 or 32 ) for providing a population of electrons ( 34 or 36 ) in an ICP-MS ( 22 ) may comprise a magnetic field means such as an electric coil, or an electron generating device. The population of electrons has an electron number density (>10 11 cm −3 to 10 14 cm −3 ), a free electron energy (>0.01 eV to <5 eV) in a region at a low pressure (<10 Torr), such that for a predetermined path length (1–4 cm) of the ions through the electron population, the interfering ions will preferentially be attenuated by the dissociative recombination process. The ion beam ( 40 ) then passes to a mass analyser ( 42 ) and ions which have been separated according to their mass-to-charge ratio are detected by ion detector ( 44 ). |
| priorityDate | 2001-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.