http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0551722-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_906e00c1f3ce18166d780da5128c370b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-622 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 |
| filingDate | 1992-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3a61d6509ac52a7addc3fb65f81c1c4a |
| publicationDate | 1993-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0551722-A1 |
| titleOfInvention | Improvements to ion mobility spectrometers |
| abstract | An ion mobility spectrometer is provided which employs an electron capture process. A sample gas stream is irradiated to produce positive ions and electrons in an ionization chamber (26). An open grid electrode (E₁) is employed in the ionization chamber to maintain a field-free space that allows ion population to build up in the ionization chamber. However, a high electric field is periodically generated across the ionization chamber for periods of less than one millisecond to cause most ions of one polarity in the ionization chamber to be swept out and into a drift chamber (30). Ions of opposite polarity are discharged on the walls of the ionization chamber (26). The ions entering the drift chamber (30) travel at drift velocities dependent on their respective charge and mass. A collector electrode (32) is provided for sequentially collecting ions of differing mass, and the collected ion current is transmitted to a signal processing means for measuring intensity and arrival times for the collected ions. A potential can be maintained between the drift chamber (30) and the ionization chamber (26) for preventing ions from travelling down the drift chamber. However, this potential between the drift chamber and the ionization chamber may periodically be switched synchronously with the generation of the field across the ionization chamber to enable ions to pass into the drift chamber during the switching. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008047156-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103165386-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103165385-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103165386-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103165385-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103871821-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1229995-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02097423-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1229995-A4 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6765198-B2 |
| priorityDate | 1992-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.