http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2604191-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_59c6a921f33fe0adc58c2b6177184515 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-0303 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-80 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N31-22 |
| filingDate | 2006-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_96fff690146851f4d9ec65d1116000bc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a3762fc617284ba4590bce997af792a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a493974d47223d19f5f31c4b6ae19888 |
| publicationDate | 2006-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2604191-A1 |
| titleOfInvention | Spectrophometric measurements of ph in-situ |
| abstract | Automated in-situ instrumentation has been developed for sensitive, precise and accurate measurements of a variety of analytes in natural waters In this work we describe the use of 'SEAS' (Spectrophotometry Elemental Analysis System) instrumentation for measurements of solution pH SEAS-pH incorporates a CCD-based spectrophotometer, an incandescent light source, and dual pumps for mixing natural water samples with a sulfonephthalein indicator The SEAS-pH optical cell consists of either a liquid core waveguide (LCW, Teflon AF 2400) or custom-made PEEK tubing Long optical pathlengths allow use of indicators at low concentrations, thereby precluding indicator- induced pH perturbations Laboratory experiments show that pH measurements obtained using LCW and PEEK optical cells are indistinguishable from measurements obtained using conventional spectrophotometric cells and high-performance spectrophotometers Deployments in the Equatorial Pacific and the Gulf of Mexico demonstrate that the SEAS-pH instrument is capable of obtaining vertical pH profiles with high spatial resolution SEAS-pH deployments at a fixed river-site (Hillsborough River, FL) demonstrate the capability of SEAS for observations of diel pH cycles with high temporal resolution The in-situ precision of SEAS-pH is better than 0 002 pH units, and the system's measurement frequency is approximately 0 5 Hz This work indicates that in-situ instrumentation can be used to provide unique capabilities for observations of carbon-system transformations in the natural environment. |
| priorityDate | 2005-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.