http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105043923-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N5-04 |
| filingDate | 2015-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2018-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2018-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105043923-B |
| titleOfInvention | A kind of detection method of first piperazine and its by-product |
| abstract | The present invention discloses the detection method of a kind of first piperazine and its by-product, weighs first piperazine sample, and lower alcohols solvent is added and dissolves to obtain sample solution；Sample solution is pipetted, low-alcohol solution, crystal aluminum chloride solution is added, sodium tetraphenylborate solution is added and is uniformly mixed, standing at least 10 minutes must precipitate；Precipitating is filtered, washed, drying to constant weight；After precipitating after drying is dissolved with dimethylformamide, it is transferred to be titrated in conical flask；Isopropanol is sequentially added, 2-3 drop thymol blue indicator solutions, it is titration end-point that it is blue, which to be titrated to the solution, with tetrabutylammonium hydroxide standard solution.The detection method can simply, quickly and accurately detect first piperazine content, the content of N- piperidine hydrochloride by-product can be detected simultaneously, it can be applied in the detection of most of first piperazine formulation products, it does not need using expensive analysis instrument, testing cost is low, it is difficult to solve the problems, such as that first piperazine formulation products test and analyze for testing result accurate stable. |
| priorityDate | 2015-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.