http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0533682-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8c7c0ff4ca25d7e88733b0e99d873990 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-66 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 |
| filingDate | 1991-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_af2b1132405896aec84a68e48e9d58bc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0229eda1f9730a135da5a078eae9fb37 |
| publicationDate | 1993-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0533682-A1 |
| titleOfInvention | METHOD AND DEVICE FOR DETECTING SUBSTANCES IN AN AMBIENT SUBSTANCE, IN PARTICULAR FOR DETECTING CHEMICAL COMBAT AGENTS. |
| abstract | The invention relates to a method and a device for detecting substances (A, B) in an ambient substance, in particular for detecting chemical warfare agents in the ambient air. According to said method, light reaction ions (O2-, H+ with H2O groups) are generated in a reaction substance (ambient air, H2O) and added to the mixture consisting of substance (A, B) and substance ambient. Reaction ions (O2-, H+ with H2O groups) settle in a measuring chamber (10) in a spatially non-uniform distribution of heavy molecules (MA-, MB+) of the substance (A, B) to form ions of quasi-molecules (MA-, MB+). A time-varying electric field of predetermined base frequency and amplitude, which alternates around a zero line, is generated in the measuring chamber (10). The ion current of quasi-molecules due to the electric field is measured and the obtained measurement signal is evaluated. To distinguish a first substance (A) from a second substance (B) present at the same time in the ambient substance, a preliminary test is first carried out for a defined measuring chamber (10) in order to determine the current dependence of ions of quasi-molecules with respect to the base frequency, and both the magnitude and the asymmetry of the time variation of the electric field strength around the zero line are determined, separately, for the first (A) and the second (B) substances. A first measurement relating to the mixture (32) is then taken at the level of a first asymmetry, this measurement being followed by a second measurement relating to said mixture (32), at the level of a second asymmetry. The measurement signals resulting from these two measurements are logically combined. |
| priorityDate | 1991-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.