http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1244544-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3832060289af7e5908358f5fd38317f6 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T436-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N31-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N31-22 |
| filingDate | 1969-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1971-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1244544-A |
| titleOfInvention | Method for determining the phosphate content of liquids |
| abstract | 1,244,544. Determining phosphate content. BETZ LABORATORIES Inc. 5 Dec., 1969 [9 Dec., 1968], No. 59464/69. Heading B1X. The phosphate content of a liquid containing polyphosphates or complex phosphates is determined by first adding to a sample a first aqueous solution comprising a water soluble ferric salt, e.g. 3-9 per cent (by weight) of ferric chloride, an alkali metal halide, e.g. 10-30 per cent of sodium fluoride, 25-75 per cent of a lower fatty acid (i.e. containing from 1-6 carbon atoms), e.g. acetic or propionic acid, and 1-3 per cent of an alkali metal salt of the or another lower fatty acid. The resultant solution is mixed and then treated with a second solution comprising a hydrobenzoic acid, e.g. salicylic or resorcylic acid, and then a lower fatty acid. After mixing the colour of the final solution is compared with standard values either visually e.g. using photographic slides or by using a colour photometer and comparing the results with those of solutions having known phosphate concentrations. The pH of the test solution is preferably between 2-3. |
| priorityDate | 1968-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.