Characterization of a very low power argon CCP

Anghel, Sorin; Simon, A.; Frențiu, Tiberiu

doi:10.1039/b502818c

Cited by 11 publications

(9 citation statements)

References 22 publications

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“…The construction of the RF generator used for sustaining of CCP (capacitively coupled plasma) at atmospheric pressure was described in details elsewhere [15]. The torch used for generating the plasma jet consists of a cylindrical sinterized alumina (Al 2 O 3 ) piece (12.8 mm o.d.)…”

Section: Methodsmentioning

confidence: 99%

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Spectroscopic characterisation of a cross-flow plasma jet

Anghel

Simon

Radu

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Methodsmentioning

confidence: 99%

“…The plasma power was estimated by using an extracting method [15]. It represents the difference between the powers absorbed by the rf generator from its DC power supply in the presence of the plasma jet and in the absence of it, respectively.…”

Section: Methodsmentioning

confidence: 99%

Spectroscopic characterisation of a cross-flow plasma jet

Anghel

Simon

Radu

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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“…Conventional ICP sources require significant power, (water) cooling, and generally an inert gas supply. All these requirements make a handheld device essentially unmanageable [ 19 ]. Some of these requirements might be overcome or adaptable (e.g., Peltier cooling, gas scrubbers/N 2 generators, etc.…”

Section: Requirements For Excitation Ionization Sourcesmentioning

confidence: 99%

“…CCP, DBD and other plasmas described here are what are commonly known as cold plasmas because they are not observed to be in thermal equilibrium. The measurement techniques used to estimate the plasma’s temperature [ 19 ] also demonstrate that these cold plasmas are much less energetic than other plasma sources.…”

Section: Requirements For Excitation Ionization Sourcesmentioning

confidence: 99%

Moving toward a Handheld “Plasma” Spectrometer for Elemental Analysis, Putting the Power of the Atom (Ion) in the Palm of Your Hand

Buckley

Doherty

2021

Molecules

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Many of the current innovations in instrument design have been focused on making them smaller, more rugged, and eventually field transportable. The ultimate application is obvious, carrying the instrument to the field for real time sample analysis without the need for a support laboratory. Real time data are priceless when screening either biological or environmental samples, as mitigation strategies can be initiated immediately upon the discovery that contaminant metals are present in a location they were not intended to be. Additionally, smaller “handheld” instruments generally require less sample for analysis, possibly increasing sensitivity, another advantage to instrument miniaturization. While many other instruments can be made smaller just by using available micro-technologies (e.g., eNose), shrinking an ICP-MS or AES to something someone might carry in a backpack or pocket is now closer to reality than in the past, and can be traced to its origins based on a component-by-component evaluation. While the optical and mass spectrometers continue to shrink in size, the ion/excitation source remains a challenge as a tradeoff exists between excitation capabilities and the power requirements for the plasma’s generation. Other supporting elements have only recently become small enough for transport. A systematic review of both where the plasma spectrometer started and the evolution of technologies currently available may provide the roadmap necessary to miniaturize the spectrometer. We identify criteria on a component-by-component basis that need to be addressed in designing a miniaturized device and recognize components (e.g., source) that probably require further optimization. For example, the excitation/ionization source must be energetic enough to take a metal from a solid state to its ionic state. Previously, a plasma required a radio frequency generator or high-power DC source, but excitation can now be accomplished with non-thermal (cold) plasma sources. Sample introduction, for solids, liquids, and gasses, presents challenges for all sources in a field instrument. Next, the interface between source and a mass detector usually requires pressure reduction techniques to get an ion from plasma to the spectrometer. Currently, plasma mass spectrometers are field ready but not necessarily handheld. Optical emission spectrometers are already capable of getting photons to the detector but could eventually be connected to your phone. Inert plasma gas generation is close to field ready if nitrogen generators can be miniaturized. Many of these components are already commercially available or at least have been reported in the literature. Comparisons to other “handheld” elemental analysis devices that employ XRF, LIBS, and electrochemical methods (and their limitations) demonstrate that a “cold” plasma-based spectrometer can be more than competitive. Migrating the cold plasma from an emission only source to a mass spectrometer source, would allow both analyte identification and potentially source apportionment through isotopic fingerprinting, and may be the last major hurdle to overcome. Finally, we offer a possible design to aid in making the cold plasma source more applicable to a field deployment.

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“…This kind of argon plasma (power, 60 W, Ar flow-rate, 0.7 l min -1 and observation high, 6mm) was tested as a spectral source for the analysis of pneumatically nebulized liquid samples [25]. The LODs for the studied elements are presented in Table 4.…”

Section: Ccp (Max 80w)mentioning

confidence: 99%

Atmospheric Pressure Plasmas in Resonant Circuits

Anghel

Frențiu²,

Simon³

2009

TOPPJ

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This paper attempts to give a short overview of atmospheric pressure plasmas generated in very non-uniform radiofrequency electric fields. All these forms of gas discharges have a common characteristic: they are generated based on the possibility to obtain very high voltages in resonant series RLC circuits. The paper presents both the radiofrequency generators designed in this aim and some applications of generated plasmas, especially as spectral source for analyzing of liquid and solid samples and as bacterial deactivation agent. Thus, this paper is meant for both laboratory plasma generators designers and plasma spectroscopists.

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Characterization of a very low power argon CCP

Cited by 11 publications

References 22 publications

Spectroscopic characterisation of a cross-flow plasma jet

Spectroscopic characterisation of a cross-flow plasma jet

Moving toward a Handheld “Plasma” Spectrometer for Elemental Analysis, Putting the Power of the Atom (Ion) in the Palm of Your Hand

Atmospheric Pressure Plasmas in Resonant Circuits

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