Sample introduction system for inductively coupled plasma and other gas-phase, or particle, detectors utilizing an enclosed filter solvent removal system, and method of use
US5400665A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Mar 3, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/1463
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An efficient sample introduction system and method of use, for accepting liquid sample solutions, nebulizing them to form nebulized sample solution droplets, desolvating and removing solvent therefrom, and introducing the resulting desolvated nebulized sample particles to sample analysis systems is disclosed. In the preferred embodiment a flow of heated gas is caused to flow over the outer surface of a coiled essentially tubular shaped enclosed filter to remove solvent vapor which diffuses through the coiled essentially tubular shaped enclosed filter while a mixture of desolvated nebulized sample particles and solvent vapor is caused to flow therethrough. A modified embodiment utilizes a low temperature condenser in place of the heated gas flow. Nebulization of sample solutions is accomplished by use of high efficiency ultrasonic or direct injection micro nebulizer systems. Desolvation is performed in a desolvation chamber in which heating elements provide a temperature sufficient to vaporize solvent present. The sample introduction system provides improved sample solution nebulization, desolvation and solvent removal, as well as reduced sample loss and carry-over of sample from on…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.