UV-photochemical vapor generation of tellurium in a thin-film photoreactor with fast stripping of volatile compounds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F22%3A00559731" target="_blank" >RIV/68081715:_____/22:00559731 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/22:10452266

Výsledek na webu

<a href="https://hdl.handle.net/11104/0332937" target="_blank" >https://hdl.handle.net/11104/0332937</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00706-022-02954-4" target="_blank" >10.1007/s00706-022-02954-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

UV-photochemical vapor generation of tellurium in a thin-film photoreactor with fast stripping of volatile compounds

Popis výsledku v původním jazyce

UV-photochemical vapor generation (UV-PVG) of tetravalent tellurium was investigated in a continuous flow mode using a special experimental setup of the photoreactor where the flow of a carrier gas was admitted upstream of the photoreactor. This was reflected in formation of a thin film of the reaction medium, leading to more effective penetration of UV radiation into the liquid medium as well as release of generated volatile compounds of Te. The aim of the study was to investigate the effect of this unconventional PVG arrangement on the optimal conditions and performance of the method. Only 4 mol dm(-3) acetic acid as the reaction medium at a flow rate of 2.8 cm(3) min(-1) was found optimal for UV-PVG of Te(IV) in this photoreactor. Addition of H-2 and temperatures higher than 900 degrees C were required for efficient atomization in a quartz tube atomizer indicating molecular nature of volatile species. The limit of detection and repeatability obtained for the coupling of UV-PVG with a high-resolution continuum source atomic absorption spectrometry (AAS) were 0.85 mu g dm(-3) and 1.2% (n= 10) at 250 mg dm(-3) Te(IV), respectively. The overall generation efficiency of approximately 8% at UV-PVG conditions optimal for AAS measurements was determined. The differences, similarities and performance of the two generator arrangements are discussed.

Název v anglickém jazyce

UV-photochemical vapor generation of tellurium in a thin-film photoreactor with fast stripping of volatile compounds

Popis výsledku anglicky

UV-photochemical vapor generation (UV-PVG) of tetravalent tellurium was investigated in a continuous flow mode using a special experimental setup of the photoreactor where the flow of a carrier gas was admitted upstream of the photoreactor. This was reflected in formation of a thin film of the reaction medium, leading to more effective penetration of UV radiation into the liquid medium as well as release of generated volatile compounds of Te. The aim of the study was to investigate the effect of this unconventional PVG arrangement on the optimal conditions and performance of the method. Only 4 mol dm(-3) acetic acid as the reaction medium at a flow rate of 2.8 cm(3) min(-1) was found optimal for UV-PVG of Te(IV) in this photoreactor. Addition of H-2 and temperatures higher than 900 degrees C were required for efficient atomization in a quartz tube atomizer indicating molecular nature of volatile species. The limit of detection and repeatability obtained for the coupling of UV-PVG with a high-resolution continuum source atomic absorption spectrometry (AAS) were 0.85 mu g dm(-3) and 1.2% (n= 10) at 250 mg dm(-3) Te(IV), respectively. The overall generation efficiency of approximately 8% at UV-PVG conditions optimal for AAS measurements was determined. The differences, similarities and performance of the two generator arrangements are discussed.

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

2022

Kód důvěrnosti údajů

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

Název periodika

Monatshefte fur Chemie

ISSN

0026-9247

e-ISSN

1434-4475

Svazek periodika

153

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

9

Strana od-do

811-819

Kód UT WoS článku

000830985600001

EID výsledku v databázi Scopus

—