http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1122763-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1acd73aacb677d58b6508231ded15757 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-4215 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J49-063 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J49-42 |
| filingDate | 1989-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b9fde4025b8602a8a58483bad98223b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_da4d4288ec6e1b70ef0250ec18421895 |
| publicationDate | 2001-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1122763-A2 |
| titleOfInvention | Mass spectrometer and method with improved ion transmission |
| abstract | In a mass spectrometer system, ions travel throughnan orifice (26) in an inlet plate (28) into a firstnvacuum chamber (30) containing AC-only rods (32), andnthen through an orifice (34) into a second vacuum chambern(38) containing a standard quadrupole (40). The secondnvacuum chamber is held at low pressure, e.g. .02nmillitorr or less, but the product of the pressure in thenfirst chamber times the length of the AC-only rods isnheld above 2.25 X 10 -2 torr cm, preferably between 6 X 10 -2 nand 15 X 10 -2 torr cm, and the DC voltage between theninlet plate and the AC-only rods is kept low, e.g.nbetween 1 and 30 volts, preferably between 1 and 10nvolts. This produces a large enhancement in ion signal,nwith less focussing aberration and better sensitivity atnhigh masses, and also allows the use of smaller, cheapernpumps so the system can be more easily transportable. |
| priorityDate | 1988-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 242.