Predicate |
Object |
assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1721d75f5bf603447ec5a26b5c1c0be0 |
classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N2021-1751 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-276 |
classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-108 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-0272 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-0283 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-0286 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N33-182 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3577 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-274 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-31 |
classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-27 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-35 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N33-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J3-42 |
filingDate |
2003-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_140bcad4747980ea8a25605ef7fd5126 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2d6697f77b316b9f69d962a90cdb172 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b515121c9c2924b5c192e4b21deb1b04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9d2c7ff519c7b5eea9b67b0668581ca7 |
publicationDate |
2007-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
EP-1567840-A4 |
titleOfInvention |
DEVICE FOR MEASURING ARSENIC |
abstract |
A field test-kit for analyzing arsenic concentration in water samples incudes a portable infrared beam photometer for measuring light absorbance in aqueous specimens. An infrared ligth emittng diode (120A, 120B) is configured to direct a beam of light through a specimen. A photodetecotr diode (130A, 130B) measures the intensity of light passing through the specimen. The photodetector (130A, 130B) output voltages relate to the light absorbed in the specimen and are displayed on a LCD (160) screen. To test for arsenic, molybdenum-blue color complexes. The light absorbance of a specimen with both arsenates and phosphates bound in molybdenum-blue color complexes is compared to that of a reference specimen in which phosphates but not arsenates are bound and converted. A quantitative value for the arsenic concentration in the water sample is determined from the differential light absorbance of the two specimens. |
priorityDate |
2002-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type |
http://data.epo.org/linked-data/def/patent/Publication |