UV-photochemical vapour generation with in situ trapping in a graphite tube atomizer for ultratrace determination of selenium

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10312013" target="_blank" >RIV/00216208:11310/15:10312013 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c5ja00173k" target="_blank" >http://dx.doi.org/10.1039/c5ja00173k</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c5ja00173k" target="_blank" >10.1039/c5ja00173k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

UV-photochemical vapour generation with in situ trapping in a graphite tube atomizer for ultratrace determination of selenium

Popis výsledku v původním jazyce

A very sensitive method has been developed for the determination of selenium (Se(IV)) utilizing continuous UV-photochemical vapour generation followed by in situ trapping and atomization of the generated volatile compounds in the graphite tube atomizer.Formic acid was chosen as a photochemical agent for the UV-assisted conversion of the analyte from the condensed to the gaseous phase. The only other chemical added to the liquid reaction mixture was nitric acid, which significantly increased the analytical signal. Introduction of selenium volatile products into the graphite tube covered with an iridium permanent modifier was done automatically. Optimum experimental conditions for generation, collection and atomization of volatile compounds were found and the analytical characteristics of the method were subsequently determined. A very low concentration limit of detection 4.1 ng L-1 of Se(IV) (corresponding to an absolute LOD 18 pg) was achieved. The repeatability expressed as % RSD was

Název v anglickém jazyce

UV-photochemical vapour generation with in situ trapping in a graphite tube atomizer for ultratrace determination of selenium

Popis výsledku anglicky

A very sensitive method has been developed for the determination of selenium (Se(IV)) utilizing continuous UV-photochemical vapour generation followed by in situ trapping and atomization of the generated volatile compounds in the graphite tube atomizer.Formic acid was chosen as a photochemical agent for the UV-assisted conversion of the analyte from the condensed to the gaseous phase. The only other chemical added to the liquid reaction mixture was nitric acid, which significantly increased the analytical signal. Introduction of selenium volatile products into the graphite tube covered with an iridium permanent modifier was done automatically. Optimum experimental conditions for generation, collection and atomization of volatile compounds were found and the analytical characteristics of the method were subsequently determined. A very low concentration limit of detection 4.1 ng L-1 of Se(IV) (corresponding to an absolute LOD 18 pg) was achieved. The repeatability expressed as % RSD was

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

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

—

Svazek periodika

30

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

1752-1763

Kód UT WoS článku

000358500800007

EID výsledku v databázi Scopus

2-s2.0-84937676276