Intra-microspray ICP torch
US4990740A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An intra-microspray ICP torch for use in conjunction with spectographic analysis generates a high temperature ionized gas in a plasma region at one end of the torch, and includes a preshaped tube mounted within the torch, with a first end of the tube terminating adjacent the plasma region, and a nebulizer mounted to a second end of the tube. The preshaped tube has at least one set of impactors that define at least two chambers, the impactors blocking the line of sight between adjacent chambers. The nebulizer propels a pressurized aerosol/sample mixture at the impactors, toward the plasma region. The impactors divert the mixture as it travels from chamber to chamber toward the plasma region, causing a filtering effect that promotes passage to the plasma region of sample particles having a size of about 15 microns or less, thereby resulting in optimum spectrographic clarity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.