| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N31-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N30-72
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-17
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-207497
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-23
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N30-461 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D59-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N30-84 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-72 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D59-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N30-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N31-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N25-48 |
| filingDate |
1990-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d01081609a81681c22bdce142f6d6df9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5660d82c81dd284329a5e5e23be41a69 |
| publicationDate |
2001-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2025729-C |
| titleOfInvention |
Isotopic composition analyzer |
| abstract |
The invention comprises an on-line mass spectrometric method and apparatus for the determination of the isotopic composition of at least oxygen, hydrogen and nitrogen in a compound or mixture of compounds. A mixture contained in syringe 6 is injected through injector 7 on a chromatographic column 1. Compounds eluting from the column 1 pass into a catalytic reactor 14 (typically a platinum\rhodium capillary tube containing elemental carbon and maintained at 1200°C) and are decomposed to produce carbon monoxide, molecular nitrogen, and molecular hydrogen. These gases are analyzed by an isotope-ratio mass spectrometer 4 so that the isotopic composition of the oxygen, nitrogen and hydrogen comprised in the original compound can be determined. A second chromatographic column 24 may be provided to separate carbon monoxide and nitrogen before they are passed into the spectrometer 4, thereby allowing a low resolution spectrometer to be used for the analysis of both gases at m/e 28 daltons. |
| priorityDate |
1989-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |