Sampling and analysis of airborne particulate matter by glow discharge atomic emission and mass spectrometries
US6750449B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The apparatus and methods employ momentum separation to implement a particle beam (PB) sampling scheme for the introduction of particulate matter into low pressure (e.g., glow discharge) plasma sources for subsequent atomic emission and mass spectrometry chemical analysis in real time, whether the particles are provided in a continuous stream during the analysis or are collected in situ and analyzed periodically upon obtaining a suitable number of particles to be analyzed. The particulate matter in the particle beam (PB) is subjected to low-power laser scattering to effect particle size analysis. Gases removed by momentum separation are also analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.