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08:36
An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
Published on: November 3, 2016
Atmospheric pressure ion focusing with a vortex stream
Yuri N Kolomiets1, Viktor V Pervukhin
1Nikolaev Institute of Inorganic Chemistry of SB RAS, Acad. Lavrentieva ave., 3, 630090 Novosibirsk, Russia. ykolom@niic.nsc.ru
Talanta
|August 30, 2011
Summary
A novel gas-dynamic focusing technique using a highly whirled vortex stream significantly enhances ionized sample collection efficiency at atmospheric pressure. This method improves remote sampling for ionization analysis and potential customs applications.
Area of Science:
- Analytical Chemistry
- Physics
Background:
- Efficient ion sampling and transportation are crucial for atmospheric pressure ionization (API) techniques.
- Existing electric field focusing methods are limited by pressure requirements or sample loss.
- Nonuniform ion distribution from API sources necessitates improved focusing strategies.
Purpose of the Study:
- To introduce and evaluate a novel gas-dynamic focusing method for atmospheric pressure ion sampling.
- To enhance the efficiency of collecting ionized samples from a distance using a whirled gas stream.
- To explore the practical applications of this technique, including security screening.
Main Methods:
- Utilizing a highly whirled vortex gas stream for ion focusing at atmospheric pressure.
- Employing a Nickel-63 (63Ni) radioactive source to generate a bipolar ionized sample.
- Comparing the efficiency of the vortex stream method against traditional aspiration techniques for remote ion collection.
Main Results:
- The whirled vortex stream enhanced ionized sample collection efficiency by an order of magnitude at distances up to the vortex sampler diameter.
- A sixfold increase in radial ionized sample collection efficiency was achieved with the vortex stream.
- The study demonstrated the effectiveness of "gas-dynamic" focusing for remote ionized sample collection.
Conclusions:
- Gas-dynamic focusing with a whirled vortex stream offers a significant improvement over existing methods for atmospheric pressure ion sampling.
- This technique shows promise for applications requiring efficient remote collection of ionized samples.
- Potential applications include customs control for detecting smuggled radioactive sources.
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