http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0360862-A4
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2030-8423 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2030-8405 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2030-8435 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N30-7206 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N30-84 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-84 |
| filingDate | 1989-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1991-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0360862-A4 |
| titleOfInvention | Isotope-ratio-monitoring gas chromatography-mass spectrometry apparatus and method |
| abstract | An isotope-ratio-monitoring gas chromatography-mass spectrometry apparatus (100) and method are disclosed which provide for on-line analysis of isotope compositions with high precision. With the apparatus and method, samples are introduced in a hydrogen carrier gas into a gas chromatograph (1) and resolved into discrete compounds. The discrete compounds are thereafter introduced to a selectively permeable membrane separator (10), employing palladium, palladium alloy or other suitable material, to separate out the hydrogen carrier. A replacement carrier gas is simultaneously introduced to carry the chromatographic sample to a combustion reactor (30), water separator (60) and isotope-ratio monitoring mass spectrometer (80). The replacement carrier gas is introduced at a lower flowrate than the hydrogen carrier gas, thus permitting lower flowrates to be introduced to the mass spectrometer (80) to improve its precision. Flowrates to the mass spectrometer (80) are thus reduced without any loss of fractionation of the sample. An improved combustion system is employed to reduce system volume and equalize system pressure, while still providing quantitative combustion. |
| priorityDate | 1988-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.