Method to detect phosphorus
US5702954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/166666
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus to detect and measure the amount of phosphorus in phosphorus-containing compounds comprises a burning chamber with a housing having an integral combustion chamber. A flammable reducing agent such as hydrogen is introduced into the combustion chamber along with a sample containing phosphorus admixed with air or oxygen. At least a portion of any phosphorus in the sample will be converted into phosphorus monoxide (PO) by the combustion. The resulting phosphorus monoxide is immediately drawn into a low-pressure, ambient temperature reaction chamber and reacted with ozone to convert the phosphorus monoxide to chemiluminescent phosphorus dioxide. A light-measuring device then measures the intensity of the light released from the chemiluminescent phosphorus dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.