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

Result code in 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>

Alternative codes found

RIV/00216208:11310/22:10452266

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Monatshefte fur Chemie

ISSN

0026-9247

e-ISSN

1434-4475

Volume of the periodical

153

Issue of the periodical within the volume

9

Country of publishing house

AT - AUSTRIA

Number of pages

9

Pages from-to

811-819

UT code for WoS article

000830985600001

EID of the result in the Scopus database

—