http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1393849-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_52900ed3f0ba748e83530e01f6a6c079 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-4133 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-41 |
| filingDate | 1973-10-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1393849-A |
| titleOfInvention | Chemical analysis apparatus |
| abstract | 1393849 Chemical analysis GOW-MAC INSTRUMENT CO Inc 12 Oct 1973 [6 Nov 1972] 47691/73 Heading G1A The invention relates to the chemical analysis of a material by its effect on the refractive index of a solvent, using the Christiansen filter effect, viz the difference in variation of the refractive index of solids and liquids with the wavelength of light. As illustrated Fig. 1, (not shown), the solvent (ISO-OCTANE) is pumped through parallel reference and sample tubes. The tubes are packed with grannules (e.g. LITHIUM FLUORIDE which has the same refractive index as ISO-OCTANE at the sodium-D-line, and hence transmits light without dispersion at this wavelength). The sample is injected into the solvent flowing through the measuring tube, and collimated light is projected through the tubes on to respective photo-sensors (e.g. photo-FET's), whose outputs are compared. Fig.4 illustrates the variation of refractive index with wavelength for the solid particles 55, pure solvent 57 and the solution 70. This shows the twc transmission bands around #1 and #2 for the reference and sample tubes. Since the total transmission increases with wavelength the relative amplitude of the signals may be used for measurement. Fig. 2 (not shown) illustrates a mono-block cell construction with two parallel bores closed at the ends (axially) by glass discs and screwed bushes. The light in the diffusion "halo" instead the direct beam may be measured by blanking-off the centre of the photo-sensor Fig. 3 (not shown). |
| priorityDate | 1972-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 15.