Torches and methods of using them
View Patent ↗Certain embodiments described herein are directed to a torch that includes a suitable amount of a refractory material. In some embodiments, the torch can include one or more non-refractory materials in combination with a refractory material. In some embodiments, the torch can comprise a refractory material and an optically transparent window. In other embodiments, the torch can comprise a material comprising a melting point higher than the melting point of quartz.
1. A system for sustaining an atomization source, the system comprising:
a torch comprising a hollow cylindrical outer tube comprising an entrance end and an exit end, in which the entrance end and the exit end of the torch are coupled to each other through at least one material, in which the entrance end of the torch comprises a non-refractory material, and in which a terminal end of the exit end of the torch comprises at least one refractory material; and
an induction device comprising an aperture configured to receive the torch and provide radio frequency energy to the torch to sustain the atomization source in the torch.
2. The system of claim 1 , in which the induction device is configured as a helical coil.
3. The system of claim 1 , in which the induction device is configured as at least one plate electrode.
4. The system of claim 3 , in which the induction device is configured as two plate electrodes.
5. The system of claim 3 , in which the induction device is configured as three plate electrodes.
6. The system of claim 1 , in which the torch further comprises an inner hollow cylindrical tube comprising an entrance end and an exit end.
7. The system of claim 1 , further comprising a radio frequency energy source electrically coupled to the induction device.
8. The system of claim 1 , further comprising a detector configured to detect excited species in the torch body.
9. The system of claim 1 , further comprising a mass spectrometer fluidically coupled to the torch and configured to receive species exiting from the torch.
10. The system of claim 1 , in which the refractory material comprises at least one of alumina, yttria, ceria, silicon nitride, boron nitride or refractory materials or ceramics that have working temperature greater than 1600 degrees Celsius or greater than 2000 degrees Celsius.
11. A system for sustaining an atomization source, the system comprising:
a torch comprising a hollow cylindrical outer tube comprising an entrance end and an exit end and a hollow cylindrical inner tube comprising an entrance end and an exit end, in which the inner tube is positioned in the outer tube, in which the exit end of the inner tube comprises a refractory material and in which the entrance end and the exit end of the outer tube are coupled to each other through at least one material, in which the entrance end of the outer tube comprises a non-refractory material, and in which a terminal end of the exit end of the outer tube comprises at least one refractory material; and
an induction device comprising an aperture configured to receive the torch and provide radio frequency energy to the torch to sustain the atomization source in the torch.
12. The system of claim 11 , in which the induction device is configured as a helical coil.
13. The system of claim 11 , in which the induction device is configured as at least one plate electrode.
14. The system of claim 13 , in which the induction device is configured as two plate electrodes.
15. The system of claim 13 , in which the induction device is configured as three plate electrodes.
16. The system of claim 11 , in which the inner tube further comprises a non-refractory material at the entrance end of the inner tube.
17. The system of claim 11 , further comprising a radio frequency energy source electrically coupled to the induction device.
18. The system of claim 11 , further comprising a detector configured to detect excited species in the torch body.
19. The system of claim 11 , further comprising a mass spectrometer fluidically coupled to the torch and configured to receive species exiting from the torch.
20. The system of claim 11 , in which the refractory material comprises at least one of alumina, yttria, ceria, silicon nitride, boron nitride or refractory materials or ceramics that have working temperature greater than 1600 degrees Celsius or greater than 2000 degrees Celsius.