Radical theory of hydride atomization and its significance for trace element analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F24%3A00600124" target="_blank" >RIV/68081715:_____/24:00600124 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0357484" target="_blank" >https://hdl.handle.net/11104/0357484</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sab.2024.107058" target="_blank" >10.1016/j.sab.2024.107058</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radical theory of hydride atomization and its significance for trace element analysis

Popis výsledku v původním jazyce

Extremely low limits of detection in trace element analysis can be achieved when coupling generation of volatile hydrides to the relatively simple methods of analytical atomic spectrometry - atomic fluorescence spectrometry (AFS) or atomic absorption spectrometry (AAS). To reach ideal performance of the whole analytical procedure, the atomizers dedicated for coupling with AAS or AFS (conventional externally heated quartz tubes - CQTA, miniature diffusion flames - MDF and dielectric barrier discharges - DBD) have to be optimized in terms of design as well as of operation parameters. Such an optimization can be made in a straightforward and elegant way based on the knowledge of what really happens in hydride atomizers. The key point which must be taken into account in order to understand what really happens in these atomizers is that their temperature is too low to be compatible with any significant thermal atomization of hydrides. The dramatic disagreement with the many years of experience of observing a complete conversion of hydrides to free atoms is explained by the radical theory of hydride atomization. The presented evidence corroborates the radical theory of hydride atomization in the CQTA. This makes possible optimization of design as well as of operational parameters of this kind of atomizer just on the basis of quantification of distributions of hydrogen radicals which can be determined either experimentally by two-photon absorption laser-induced fluorescence or potentially by numerical simulation. Regarding extension of the radical theory in the CQTA to MDF and DBD atomizers, more experimental evidence on free analyte atom distributions is required either to confirm its validity or to discover reasons for its failure.

Název v anglickém jazyce

Radical theory of hydride atomization and its significance for trace element analysis

Popis výsledku anglicky

Extremely low limits of detection in trace element analysis can be achieved when coupling generation of volatile hydrides to the relatively simple methods of analytical atomic spectrometry - atomic fluorescence spectrometry (AFS) or atomic absorption spectrometry (AAS). To reach ideal performance of the whole analytical procedure, the atomizers dedicated for coupling with AAS or AFS (conventional externally heated quartz tubes - CQTA, miniature diffusion flames - MDF and dielectric barrier discharges - DBD) have to be optimized in terms of design as well as of operation parameters. Such an optimization can be made in a straightforward and elegant way based on the knowledge of what really happens in hydride atomizers. The key point which must be taken into account in order to understand what really happens in these atomizers is that their temperature is too low to be compatible with any significant thermal atomization of hydrides. The dramatic disagreement with the many years of experience of observing a complete conversion of hydrides to free atoms is explained by the radical theory of hydride atomization. The presented evidence corroborates the radical theory of hydride atomization in the CQTA. This makes possible optimization of design as well as of operational parameters of this kind of atomizer just on the basis of quantification of distributions of hydrogen radicals which can be determined either experimentally by two-photon absorption laser-induced fluorescence or potentially by numerical simulation. Regarding extension of the radical theory in the CQTA to MDF and DBD atomizers, more experimental evidence on free analyte atom distributions is required either to confirm its validity or to discover reasons for its failure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/GF23-05974K" target="_blank" >GF23-05974K: Všestranné plazmové zdroje a pokročilé přístupy ke zpracování signálu jako nové koncepty ve stopové prvkové analýze a atomové spektrometrii</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Spectrochimica Acta Part B: Atomic Spectroscopy

ISSN

0584-8547

e-ISSN

1873-3565

Svazek periodika

221

Číslo periodika v rámci svazku

NOV

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

107058

Kód UT WoS článku

001346523700001

EID výsledku v databázi Scopus

2-s2.0-85206992907