http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114400177-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_67bdd0d1f66d88860714100be6662c02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-0404 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-161 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-64 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-04 |
| filingDate | 2022-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3eea5676568a723e593372a52eba00de |
| publicationDate | 2022-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114400177-A |
| titleOfInvention | Near-normal pressure photoionization mass spectrum device for volatile and semi-volatile compounds |
| abstract | The invention provides a near-normal-pressure photoionization mass spectrum device for volatile and semi-volatile compounds, which comprises a photoionization chamber, wherein a light source and a mass spectrometer are respectively arranged at two axial ends of the photoionization chamber, one end of the photoionization chamber, which is close to the light source, is respectively provided with a sampling capillary tube and a dopant introducing tube along the radial direction, the dopant introducing tube is connected with a dopant introducing mechanism, and the connecting position of the dopant introducing tube and the photoionization chamber is positioned at one side, which is close to the light source, relative to the connecting position of the sampling capillary tube and the photoionization chamber. The invention needs to transmit the sample to the high vacuum ionization chamber, the semi-volatile sample can be directly volatilized for analysis under the state of near normal pressure, and the problem of capillary blockage is avoided; under the condition of nearly normal pressure, the sensitivity of an object to be detected can be obviously improved by higher molecular density and ion molecule collision reaction frequency, ionization is promoted by a doping agent, and the signal intensity is improved. |
| priorityDate | 2022-01-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.