Atmospheric plasma discharges as hydride atomizers for trace
element analysis: their development, applications and
mechanistic studies

a 2024

Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies

KRATZER, Jan; Milan SVOBODA; Martina MRKVIČKOVÁ; Waseem KHAN; Nima BOLOUKI et al.

Základní údaje

Originální název

Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies

Název česky

Atmosférické výboje jako atomizátory hydridů pro stopovou prvkovou analýzu: vývoj, aplikace a mechanistické studie

Autoři

KRATZER, Jan; Milan SVOBODA; Martina MRKVIČKOVÁ; Waseem KHAN; Nima BOLOUKI; Krzysztof GREDA; Pawel POHL; Alexandra SLOTA; Nikol VLČKOVÁ; Jiří DĚDINA a Pavel DVOŘÁK

Vydání

European Symposium on Analytical Spectrometry, 2024

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10406 Analytical chemistry

Stát vydavatele

Polsko

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/24:00136514

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova česky

atomizace;hydridy;plazma;výboje

Klíčová slova anglicky

atomization;hydrides;plasma;discharges

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 15. 7. 2024 13:08, doc. Mgr. Pavel Dvořák, Ph.D.

Anotace

ORIG CZ

V originále

Some analytically important elements such as As, Sb, Bi, Se, Pb, Sn, Te or Ge can be efficiently converted from a liquid sample into their volatile hydrides, yielding a 100% analyte introduction efficiency into the spectrometric detector, and surpassing thus, by an order of magnitude, the performance of common pneumatic nebulizers (5-10%). Atomic absorption spectrometry (AAS) is still the daily workhorse in trace element analysis, offering affordable instrumentation, method robustness and operator friendliness. Externally heated quartz tube atomizers (QTA) are the most common hydride atomizers in hydride generation (HG) AAS. Recently, the dielectric barrier discharges (DBD), i.e. low power and low temperature plasmas sustained by alternating voltage at atmospheric pressure, have been proven as promising hydride atomizers at least for some of the elements listed above. Other types of atmospheric plasma discharges, namely a RF plasma jet called plasma pencil, or a discharge sustained inside a quartz tube between two bare electrodes, i.e. with no dielectric barrier, have been investigated as alternative hydride atomizers, especially to overcome difficulties with atomization of Pb, Sn or Ge hydrides in DBD. Experimental conditions were optimized individually for each analyte in all three plasma atomizer designs. Sensitivities and limits of detection were determined as basic figures of merit to assess the atomizer applicability to routine measurements. Each atomizer design was also characterized in terms of plasma temperature, absolute concentration and spatial distribution of H radicals as important species responsible for hydride atomization determined by two photon laser induced fluorescence (TALIF). For selected elements, the absolute concentration of free analyte atoms and their spatial distribution was measured by LIF allowing to quantify atomization efficiency. Detailed insights into hydride atomization mechanisms, which are strongly element-dependent, will be shown using Ge and Se as target analytes. The sensitivity trends observed in AAS measurements correlate perfectly with atomization efficiency determined by LIF. Also the tendency of individual analytes to deposit in the discharge area, quantified by leaching experiments, seems to agree with element dependent life-time of free atoms. The advantages of plasma diagnostics by LIF and TALIF, and the importance of these methods for further improving the hydride atomizers performance will be discussed. Potential coupling of the plasma sources investigated with other atomic spectrometric detectors such as atomic fluorescence or optical emission spectrometry will be outlined.

Česky

Studium atomizace těkavých hydridů As, Sb, Bi, Se, Pb, Sn, Te a Ge v plazmatu atmosférických výbojů.

Návaznosti

GF23-05974K, projekt VaV

Název: Všestranné plazmové zdroje a pokročilé přístupy ke zpracování signálu jako nové koncepty ve stopové prvkové analýze a atomové spektrometrii

Investor: Grantová agentura ČR, Všestranné plazmové zdroje a pokročilé přístupy ke zpracování signálu jako nové koncepty ve stopové prvkové analýze a atomové spektrometrii, Lead agentura

LM2023039, projekt VaV

Název: Centrum výzkumu a vývoje plazmatu a nanotechnologických povrchových úprav

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, R&D centre for plasma and nanotechnology surface modifications

Citovat

KRATZER, Jan; Milan SVOBODA; Martina MRKVIČKOVÁ; Waseem KHAN; Nima BOLOUKI; Krzysztof GREDA; Pawel POHL; Alexandra SLOTA; Nikol VLČKOVÁ; Jiří DĚDINA a Pavel DVOŘÁK. Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies. In European Symposium on Analytical Spectrometry. 2024.

@proceedings{2418580,
   author = {Kratzer, Jan and Svoboda, Milan and Mrkvičková, Martina and Khan, Waseem and Bolouki, Nima and Greda, Krzysztof and Pohl, Pawel and Slota, Alexandra and Vlčková, Nikol and Dědina, Jiří and Dvořák, Pavel},
   booktitle = {European Symposium on Analytical Spectrometry},
   keywords = {atomization;hydrides;plasma;discharges},
   language = {eng},
   note = {Dále podporováno projekty: the Polish National Science Center (2022/04/Y/ST4/00055), Institute of Analytical Chemistry (RVO: 68081715)},
   title = {Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies},
   year = {2024}
}

TY  - CONF
ID  - 2418580
AU  - Kratzer, Jan - Svoboda, Milan - Mrkvičková, Martina - Khan, Waseem - Bolouki, Nima - Greda, Krzysztof - Pohl, Pawel - Slota, Alexandra - Vlčková, Nikol - Dědina, Jiří - Dvořák, Pavel
PY  - 2024
TI  - Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies
N1  - Dále podporováno projekty: the Polish National Science Center (2022/04/Y/ST4/00055), Institute of Analytical Chemistry (RVO: 68081715)
KW  - atomization;hydrides;plasma;discharges
N2  - Some analytically important elements such as As, Sb, Bi, Se, Pb, Sn, Te or Ge can be efficiently converted from a liquid sample into their volatile hydrides, yielding a 100% analyte introduction efficiency into the spectrometric detector, and surpassing thus, by an order of magnitude, the performance of common pneumatic nebulizers (5-10%). Atomic absorption spectrometry (AAS) is still the daily workhorse in trace element analysis, offering affordable instrumentation, method robustness and operator friendliness. Externally heated quartz tube atomizers (QTA) are the most common hydride atomizers in hydride generation (HG) AAS. Recently, the dielectric barrier discharges (DBD), i.e. low power and low temperature plasmas sustained by alternating voltage at atmospheric pressure, have been proven as promising hydride atomizers at least for some of the elements listed above. Other types of atmospheric plasma discharges, namely a RF plasma jet called plasma pencil, or a discharge sustained inside a quartz tube between two bare electrodes, i.e. with no dielectric barrier, have been investigated as alternative hydride atomizers, especially to overcome difficulties with atomization of Pb, Sn or Ge hydrides in DBD. Experimental conditions were optimized individually for each analyte in all three plasma atomizer designs. Sensitivities and limits of detection were determined as basic figures of merit to assess the atomizer applicability to routine measurements. Each atomizer design was also characterized in terms of plasma temperature, absolute concentration and spatial distribution of H radicals as important species responsible for hydride atomization determined by two photon laser induced fluorescence (TALIF). For selected elements, the absolute concentration of free analyte atoms and their spatial distribution was measured by LIF allowing to quantify atomization efficiency. Detailed insights into hydride atomization mechanisms, which are strongly element-dependent, will be shown using Ge and Se as target analytes. The sensitivity trends observed in AAS measurements correlate perfectly with atomization efficiency determined by LIF. Also the tendency of individual analytes to deposit in the discharge area, quantified by leaching experiments, seems to agree with element dependent life-time of free atoms. The advantages of plasma diagnostics by LIF and TALIF, and the importance of these methods for further improving the hydride atomizers performance will be discussed. Potential coupling of the plasma sources investigated with other atomic spectrometric detectors such as atomic fluorescence or optical emission spectrometry will be outlined.
ER  -

KRATZER, Jan; Milan SVOBODA; Martina MRKVIČKOVÁ; Waseem KHAN; Nima BOLOUKI; Krzysztof GREDA; Pawel POHL; Alexandra SLOTA; Nikol VLČKOVÁ; Jiří DĚDINA a Pavel DVOŘÁK. Atmospheric plasma discharges as hydride atomizers for trace element analysis: their development, applications and mechanistic studies. In \textit{European Symposium on Analytical Spectrometry}. 2024.

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