http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0119501-A9
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d07d5f96f0cc72298e81593e00359bdc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-622 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-64 |
| filingDate | 2000-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_41f3462ec47e0916e3d344c5538ef164 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_73259e171155b6b07eaf900391cd53dd |
| publicationDate | 2002-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-0119501-A9 |
| titleOfInvention | Selective photo-ionization detector using ion mobility spectrometry |
| abstract | A photo-ionization detector (PID) (10) employs combinations of ion mobility spectrometry, ionization energy discrimination, and chemical filtering to identify the presence and quantity of specific gases. One such PID introduces a gas sample into an ionization chamber (14) at an end of a drift tube (16). UV light from a PI source (20) ionizes ionizable molecules contained in the gas sample. The PI source includes either multiple UV lamps (21), each having a specific energy level for discriminating between potential constituents of the gas sample or one multiple-energy level UV lamp with different light bandwidth window zones and a zone selector. A shutter grid (18) is open, an electric field in the drift tube attracts ions that travel against the flow of a drift gas until a collector electrode (32) at the end of the drift tube captures the ions. A time required for the ions to travel the length of the drift tube is characteristic of the type of ion. Thin mesh electrodes (30) in the drift tube sustain a uniform electric field so that groups of ions traveling down the drift tube to create well defined current pulses at the collector electrode. |
| priorityDate | 1999-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.