Selenium preconcentration in a gold "amalgamator" after hydride generation for atomic spectrometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43934131" target="_blank" >RIV/60461373:22340/20:43934131 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081715:_____/20:00533064

Výsledek na webu

<a href="https://doi.org/10.1039/D0JA00227E" target="_blank" >https://doi.org/10.1039/D0JA00227E</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0ja00227e" target="_blank" >10.1039/d0ja00227e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Selenium preconcentration in a gold "amalgamator" after hydride generation for atomic spectrometry

Popis výsledku v původním jazyce

A gold amalgamator, used conventionally for Hg vapor enrichment, is reported to preconcentrate Se after hydride generation. The optimum trapping and volatilization temperatures were 450 and 970 degrees C, respectively. Preconcentration processes are controlled by temperature only while the carrier gas composition remains unchanged (75 ml min(-1)H(2)). This is a significant advantage compared to the approach reported previously based on gold wire, where Se preconcentration was controlled by both surface temperature and carrier gas composition. Moreover, the gold amalgamator offers higher capacity and better resistance to interference, at least by an order of magnitude. This approach to Se preconcentration is very well compatible with atomic absorption spectrometry using a modular trap-and-atomizer device reported recently. The limit of detection for 300 s sample introduction time reached 13 pg ml(-1)Se (absolute LOD 247 pg Se). The method developed was validated by analysis of water certified reference materials. The mechanism of selenium hydride trapping was investigated employing a(75)Se radioactive indicator. The potential of coupling the gold amalgamator trap to an inductively coupled plasma mass spectrometer was also investigated. However, severe transport losses of volatilized Se species occur between the heated amalgamator and the torch due to analyte condensation on colder surfaces, preventing routine use of this set-up.

Název v anglickém jazyce

Selenium preconcentration in a gold "amalgamator" after hydride generation for atomic spectrometry

Popis výsledku anglicky

A gold amalgamator, used conventionally for Hg vapor enrichment, is reported to preconcentrate Se after hydride generation. The optimum trapping and volatilization temperatures were 450 and 970 degrees C, respectively. Preconcentration processes are controlled by temperature only while the carrier gas composition remains unchanged (75 ml min(-1)H(2)). This is a significant advantage compared to the approach reported previously based on gold wire, where Se preconcentration was controlled by both surface temperature and carrier gas composition. Moreover, the gold amalgamator offers higher capacity and better resistance to interference, at least by an order of magnitude. This approach to Se preconcentration is very well compatible with atomic absorption spectrometry using a modular trap-and-atomizer device reported recently. The limit of detection for 300 s sample introduction time reached 13 pg ml(-1)Se (absolute LOD 247 pg Se). The method developed was validated by analysis of water certified reference materials. The mechanism of selenium hydride trapping was investigated employing a(75)Se radioactive indicator. The potential of coupling the gold amalgamator trap to an inductively coupled plasma mass spectrometer was also investigated. However, severe transport losses of volatilized Se species occur between the heated amalgamator and the torch due to analyte condensation on colder surfaces, preventing routine use of this set-up.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY

ISSN

0267-9477

e-ISSN

1364-5544

Svazek periodika

35

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

2132-2141

Kód UT WoS článku

000578579900004

EID výsledku v databázi Scopus

2-s2.0-85093513697