Spark discharge trace element detection system
US4766318A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | May 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/67
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spark discharge trace element detection system is provided which includes a spark chamber including a pair of electrodes for receiving a sample of gas to be analyzed at no greater than atmospheric pressure. A voltage is provided across the electrodes for generating a spark in the sample. The intensity of the emitted radiation in at least one primary selected narrow band of the radiation is detected. Each primary band corresponds to an element to be detected in the gas. The intensity of the emission in each detected primary band is integrated during the afterglow time interval of the spark emission and a signal representative of the integrated intensity of the emission in each selected primary bond is utilized to determine the concentration of the corresponding element in the gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.