Preliminary Investigations of High-Frequency Atmospheric-Pressure Plasma Jet for Atomic Emission Spectrometry

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Title:Preliminary Investigations of High-Frequency Atmospheric-Pressure Plasma Jet for Atomic Emission Spectrometry
Creators:
Štěpán, Martin
Semerád, Martin
Kanický, Viktor
Otruba, Vítězslav
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 9, pp. 1348-1358
Uncontrolled Keywords:AES, Chemical analysis, Plasma discharge, Atomic emission spectrometry, High-frequency plasma jet, Alkali metals

Abstract

The 27.12- and 13.56-MHz plasma-jet discharges are generated in argon at atmospheric pressure. The plasma originates inside the nozzle of the bored metal power electrode and outflows against the counter-electrode. The discharge has a column shape with the diameter about 0.7-1.5 mm and the length 5-30 mm. The 27.12 MHz/100 W and 13.56 MHz/1&nbsp;500 W generators are operated at a power of 100 and 200 W, respectively. Stable discharges are obtained within the range from 0.3 to 0.9 dm<sup>3</sup> min<sup>-1</sup> Ar. The 27.12 MHz/100 W discharge is capable of accepting dry aerosol while the wet aerosol extinguishes this plasma. On the contrary, wet aerosol can be introduced into the 13.56 MHz/200 W plasma. The vibrational temperature of 3 000 K has been determined based on the intensity of the molecular band of the N<sub>2</sub> 2nd positive system (365-383 nm) in the 27.12 MHz discharge. Intensity <i>vs</i> concentration dependences have been measured with Li 670.784, Na 588.995, Na 589.592, K&nbsp;766.491 and Rb 780.023 nm lines. Limits of detection in the 27.12 MHz/100 W discharge coupled to an ultrasonic nebulizer with desolvation are 0.1 Li, 30 Na, 10 K and 3 ng cm<sup>-3</sup> Rb. Limits of detection in the 13.56 MHz/200 W discharge connected to a pneumatic concentric Meinhard nebulizer is 8 ng cm<sup>-3</sup> Li. <p>

Title:Preliminary Investigations of High-Frequency Atmospheric-Pressure Plasma Jet for Atomic Emission Spectrometry
Creators:
Štěpán, Martin
Semerád, Martin
Kanický, Viktor
Otruba, Vítězslav
Uncontrolled Keywords:AES, Chemical analysis, Plasma discharge, Atomic emission spectrometry, High-frequency plasma jet, Alkali metals
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:9
Page Range:pp. 1348-1358
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20011348UNSPECIFIED
ID Code:1861
Item Type:Article
Deposited On:06 Feb 2009 17:13
Last Modified:06 Feb 2009 16:13

Citation

Štěpán, Martin; Semerád, Martin; Kanický, Viktor; Otruba, Vítězslav (2001) Preliminary Investigations of High-Frequency Atmospheric-Pressure Plasma Jet for Atomic Emission Spectrometry. Collection of Czechoslovak Chemical Communications, 66 (9). pp. 1348-1358. ISSN 0010-0765

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