Sample introduction system for flameless emission spectroscopy
US4225235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Jul 10, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a system for analyzing the elemental or molecular composition of a sample wherein the sample components are excited through collision with an active metastable gaseous species, the excited sample components emitting a characteristic wavelength of light which may be detected, the system including a microwave cavity through which the gaseous species flows and a microwave source coupled to the cavity, the microwave discharge exciting the gaseous species, there is disclosed an improved liquid sample introduction system which causes complete vaporization and disassociation of the sample. The sample is preferably aspirated directly into the microwave discharge within which the active gas is generated. A novel sample and gas injection probe is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.