Boost devices and methods of using them
View Patent ↗A boost device configured to provide additional energy to an atomization source, such as a flame or plasma, is disclosed. In certain examples, a boost device may be used with a flame or plasma to provide additional energy to the flame or plasma to enhance desolvation, atomization, and/or ionization. In other examples, the boost device may be configured to provide additional energy for excitation of species. Instruments and devices including at least one boost device are also disclosed.
1. A device comprising:
a chamber configured to sustain an atomization source, in which the chamber comprises a substantially uniform diameter along a longitudinal axis of the chamber;
an energy delivery mechanism configured to provide radio frequency energy to the chamber to sustain the atomization source in the chamber, in which the energy delivery mechanism comprises a plate electrode comprising an aperture that is configured to receive at least some portion of the chamber to sustain the atomization source in the chamber; and
at least one boost device separate from the atomization source and the energy delivery mechanism and configured to provide additional radio frequency energy to the atomization source in the chamber, in which the boost device is configured to receive at least some portion of the chamber different from the portion received by the energy delivery mechanism.
2. The device of claim 1 in which the chamber is configured to sustain is a flame.
3. The device of claim 2 in which the flame is selected from the group consisting of a methane/air flame, a methane/oxygen flame, a hydrogen/air flame, a hydrogen/oxygen flame, an acetylene/air flame, an acetylene/oxygen flame, and an acetylene/nitrous oxide flame.
4. The device of claim 1 in which the chamber is configured to sustain an inductively coupled argon plasma.
5. The device of claim 1 in which the chamber is configured to sustain an arc or a spark.
6. The device of claim 1 in which the chamber is a hollow quartz tube.
7. The device of claim 1 in which the boost device is configured to provide the additional radio frequency energy in a pulsed mode or a continuous mode.
8. The device of claim 1 in which the boost device is configured to provide the additional radio frequency energy having a frequency of about 25 MHz to about 50 MHz.
9. The device of claim 1 in which the boost device is configured to provide the additional radio frequency energy at a power of about 100 Watts to about 2000 Watts.
10. The device of claim 1 in which the boost device comprises a coil of wire in electrical communication with a radio frequency generator.
11. The device of claim 1 in which the boost device comprises an induction coil in electrical communication with a radio frequency generator.
12. The device of claim 1 in which the energy delivery mechanism comprises a radio frequency induction coil and the chamber comprises a torch.
13. The device of claim 1 further comprising a second chamber separate from the chamber and in fluid communication with the chamber.
14. The device of claim 13 in which the second chamber further comprises a boost device configured to provide radio frequency energy to at least a portion of the second chamber.
15. The device of claim 13 in which the second chamber further comprises an interface comprising an orifice for introducing sample into the second chamber from the chamber.
16. The device of claim 15 in which the second chamber is in fluid communication with a vacuum pump configured to draw sample from the chamber into the second chamber.
17. The device of claim 15 in which the interface is configured to introduce sample from the chamber into the second chamber so that the sample is diluted by less than about 15:1 with carrier gas.
18. The device of claim 1 in which the boost device is configured to assist the atomization source in atomization.
19. The device of claim 1 in which the boost device is configured to excite atoms in the chamber.
20. A device comprising:
a first chamber configured to sustain an atomization source, in which the first chamber comprises a substantially uniform diameter along a longitudinal axis of the first chamber;
an energy delivery mechanism configured to provide radio frequency energy to the first chamber, the energy delivery mechanism comprising a plate electrode configured with an aperture to receive the first chamber to sustain the atomization source in the first chamber; and
a second chamber separate from the first chamber and in fluid communication with the first chamber, the second chamber comprising at least one boost device separate from the first chamber and the energy delivery mechanism and configured to provide radio frequency energy to the second chamber, in which the second chamber comprises a substantially similar diameter as the first chamber.
21. The device of claim 20 in which the second chamber further comprises an interface comprising an orifice for introducing sample into the second chamber from the first chamber.
22. The device of claim 21 in which the second chamber is in fluid communication with a vacuum pump configured to draw sample from the first chamber into the second chamber.
23. A device comprising:
a first chamber configured to sustain an inductively coupled plasma, in which the first chamber comprises a substantially uniform diameter along a longitudinal axis of the first chamber;
first and second plate electrodes each comprising an aperture configured to receive the first chamber, the plate electrodes configured to provide radio frequency energy to the first chamber to sustain the atomization source in the first chamber; and
a second chamber separate from the first chamber and in fluid communication with the first chamber, the second chamber comprising at least one boost device separate from the first chamber and the energy delivery mechanism and configured with a radio frequency source to provide radio frequency energy to the second chamber, in which the second chamber comprises a substantially similar diameter as the first chamber.
24. The device of claim 1 , in which the energy delivery mechanism comprises two plate electrodes.
25. The device of claim 20 , in which the energy delivery mechanism comprises two plate electrodes.
26. The device of claim 23 , in which the second chamber further comprises an interface comprising an orifice for introducing sample into the second chamber from the first chamber.