Behaviour of analytical spectral lines emitted by plasma pencil
operated in a continuous and in a pulsed mode

a 2012

Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode

NOVOSÁD, Lukáš, Aleš HRDLIČKA, Pavel SLAVÍČEK, Vítězslav OTRUBA, Viktor KANICKÝ et. al.

Základní údaje

Originální název

Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode

Název česky

Chování analytických čar emitovaných plazmovou tužkou v kontinuálním a pulzním režimu

Autoři

NOVOSÁD, Lukáš (203 Česká republika, domácí), Aleš HRDLIČKA (203 Česká republika, garant, domácí), Pavel SLAVÍČEK (203 Česká republika, domácí), Vítězslav OTRUBA (203 Česká republika, domácí) a Viktor KANICKÝ (203 Česká republika, domácí)

Vydání

EUROPEAN SYMPOSIUM ON ATOMIC SPECTROMETRY 2012-XXTH SLOVAK-CZECH SPECTROSCOPIC CONFERENCE, 2012

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10402 Inorganic and nuclear chemistry

Stát vydavatele

Slovensko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

odkaz na konferenční sborník abstraktů

Kód RIV

RIV/00216224:14740/12:00064558

Organizační jednotka

Středoevropský technologický institut

Klíčová slova česky

plazmová tužka; výboj; koncentrace; intenzita; pulzní; kontinuální; mód

Klíčová slova anglicky

plasma pencil; discharge; concentration; intensity; pulsed; continuous; mode;

Příznaky

Mezinárodní význam

Změněno: 28. 3. 2013 16:26, Mgr. Aleš Hrdlička, Ph.D.

Anotace

ORIG CZ

V originále

A modification of operating conditions by introduction of an admixture into the plasma gas stream was done for analytical application of plasma pencil – chemical analysis. Excitation capabilities using sets of standard water solutions containing Na+, Li+, Ca2+, Mg2+, Cu2+ and Zn2+ ions, construction of calibration dependences in the range 1–100 mg/l and calculation of instrumental detection limits for these elements (3-sigma) were done in the continuous and in the pulse mode. Aqueous solution of calibration standard (0.6 ml/min) was delivered into a Scott chamber with a concentric nebulizer with efficiency of about 6 %. The produced aerosol was introduced by argon (0.3 l/min) perpendicularly into the plasma pencil operated in flowing argon (4 l/min). Electrical input power in the range of 120–140 W coming into the plasma guaranteed a stability of the discharge with water and sample load. To create a pulsed mode a carrying wave 13.56 MHz was internally modulated by a rectangular wave 22 kHz with duty cycle 90 %. These modulation parameters guaranteed a high stability of the discharge. Rotational temperatures and electron number densities for the pencil under and without water load and sample load were calculated using OH spectra and H beta line and are very similar for both modes. Atomic lines of the elements above were well observable even if the rotational temperatures are relatively low about 1000 K. Intensities of the calibration lines in the continuous mode are lower than in the pulsed mode, linearity, range of linear concentrations and coefficients of determination of most of calibration lines are higher than in the continuous mode. Limits of detection are similar in both modes. Intensities of analytical signals, rotational temperatures and electron number densities along the discharge tube were acquired in 4 different positions in the range 11–15 cm from the aerosol entrance and an optimal position providing the best signal-to-noise ratio for each line intensity was established. These results indicate that the continuous mode should be rather replaced by the pulse mode in some analytical applications.

Česky

Zkoumaly se excitační schopnosti plazmové tužky v kontinuálním a pulzním režimu. Pulzní režim má pozitivní vliv na zlepšení detekčních schopností a citlivost metody.

Návaznosti

ED1.1.00/02.0068, projekt VaV

Název: CEITEC - central european institute of technology

Citovat

NOVOSÁD, Lukáš, Aleš HRDLIČKA, Pavel SLAVÍČEK, Vítězslav OTRUBA a Viktor KANICKÝ. Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode. In EUROPEAN SYMPOSIUM ON ATOMIC SPECTROMETRY 2012-XXTH SLOVAK-CZECH SPECTROSCOPIC CONFERENCE. 2012.

@proceedings{1093627,
   author = {Novosád, Lukáš and Hrdlička, Aleš and Slavíček, Pavel and Otruba, Vítězslav and Kanický, Viktor},
   booktitle = {EUROPEAN SYMPOSIUM ON ATOMIC SPECTROMETRY 2012-XXTH SLOVAK-CZECH SPECTROSCOPIC CONFERENCE},
   keywords = {plasma pencil; discharge; concentration; intensity; pulsed; continuous; mode;},
   language = {eng},
   title = {Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode},
   url = {http://www.spektroskopia.sk/esas-scsc/BoA.pdf},
   year = {2012}
}

TY  - CONF
ID  - 1093627
AU  - Novosád, Lukáš - Hrdlička, Aleš - Slavíček, Pavel - Otruba, Vítězslav - Kanický, Viktor
PY  - 2012
TI  - Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode
KW  - plasma pencil
KW  - discharge
KW  - concentration
KW  - intensity
KW  - pulsed
KW  - continuous
KW  - mode;
UR  - http://www.spektroskopia.sk/esas-scsc/BoA.pdf
L2  - http://www.spektroskopia.sk/esas-scsc/BoA.pdf
N2  - A modification of operating conditions by introduction of an admixture into the plasma gas stream was done for analytical application of plasma pencil – chemical analysis. Excitation capabilities using sets of standard water solutions containing Na+, Li+, Ca2+, Mg2+, Cu2+ and Zn2+ ions, construction of calibration dependences in the range 1–100 mg/l and calculation of instrumental detection limits for these elements (3-sigma) were done in the continuous and in the pulse mode. Aqueous solution of calibration standard (0.6 ml/min) was delivered into a Scott chamber with a concentric nebulizer with efficiency of about 6 %. The produced aerosol was introduced by argon (0.3 l/min) perpendicularly into the plasma pencil operated in flowing argon (4 l/min). Electrical input power in the range of 120–140 W coming into the plasma guaranteed a stability of the discharge with water and sample load. To create a pulsed mode a carrying wave 13.56 MHz was internally modulated by a rectangular wave 22 kHz with duty cycle 90 %. These modulation parameters guaranteed a high stability of the discharge. Rotational temperatures and electron number densities for the pencil under and without water load and sample load were calculated using OH spectra and H beta line and are very similar for both modes. Atomic lines of the elements above were well observable even if the rotational temperatures are relatively low about 1000 K. Intensities of the calibration lines in the continuous mode are lower than in the pulsed mode, linearity, range of linear concentrations and coefficients of determination of most of calibration lines are higher than in the continuous mode. Limits of detection are similar in both modes. Intensities of analytical signals, rotational temperatures and electron number densities along the discharge tube were acquired in 4 different positions in the range 11–15 cm from the aerosol entrance and an optimal position providing the best signal-to-noise ratio for each line intensity was established. These results indicate that the continuous mode should be rather replaced by the pulse mode in some analytical applications.
ER  -

NOVOSÁD, Lukáš, Aleš HRDLIČKA, Pavel SLAVÍČEK, Vítězslav OTRUBA a Viktor KANICKÝ. Behaviour of analytical spectral lines emitted by plasma pencil operated in a continuous and in a pulsed mode. In \textit{EUROPEAN SYMPOSIUM ON ATOMIC SPECTROMETRY 2012-XXTH SLOVAK-CZECH SPECTROSCOPIC CONFERENCE}. 2012.

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