Cadmium Assisted Photochemical Vapor Generation of Tungsten for Detection by Inductively Coupled Plasma Mass Spectrometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F19%3A00509645" target="_blank" >RIV/68081715:_____/19:00509645 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/19:10399344

Výsledek na webu

<a href="http://hdl.handle.net/11104/0300320" target="_blank" >http://hdl.handle.net/11104/0300320</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.analchem.9b04241" target="_blank" >10.1021/acs.analchem.9b04241</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cadmium Assisted Photochemical Vapor Generation of Tungsten for Detection by Inductively Coupled Plasma Mass Spectrometry

Popis výsledku v původním jazyce

Efficient photochemical vapor generation (PVG) of tungsten has been achieved for the first time using a 19 W thin film flow-through photoreactor. The volatilenproduct (most probably tungsten hexacarbonyl) was generated using a flow injection mode and 40% (v/v) formic acid as the reaction medium. An inductively coupled plasma massnspectrometer was utilized for ultrasensitive detection. The addition of Cd2+ as a sensitizer was critical, enhancing the overall PVG efficiency some 30 000-fold. At an optimalnirradiation time of 19 s, a 6.1-fold enhancement factor and an overall PVG efficiency of 43% were determined from a comparison of the response to direct solution nebulizationnwhen using a sample flow rate of 2 mL min−1 and 500 mg L−1 Cd2+ as a sensitizer. A limit of detection of 0.9 ng L−1 and repeatability (RSD) of 2% at 100 ng L−1 were achieved. Interferencenfrom inorganic acids (HNO3, HCl, H2SO4, and HF) was investigated with respect to analytical application to real samples. The accuracy and practical feasibility of this ultrasensitive methodology was successfully verified by analysis of Certified ReferencenMaterial CTA-FFA-1 (Fine Fly Ash) and six natural water samples with low W concentrations.

Název v anglickém jazyce

Cadmium Assisted Photochemical Vapor Generation of Tungsten for Detection by Inductively Coupled Plasma Mass Spectrometry

Popis výsledku anglicky

Efficient photochemical vapor generation (PVG) of tungsten has been achieved for the first time using a 19 W thin film flow-through photoreactor. The volatilenproduct (most probably tungsten hexacarbonyl) was generated using a flow injection mode and 40% (v/v) formic acid as the reaction medium. An inductively coupled plasma massnspectrometer was utilized for ultrasensitive detection. The addition of Cd2+ as a sensitizer was critical, enhancing the overall PVG efficiency some 30 000-fold. At an optimalnirradiation time of 19 s, a 6.1-fold enhancement factor and an overall PVG efficiency of 43% were determined from a comparison of the response to direct solution nebulizationnwhen using a sample flow rate of 2 mL min−1 and 500 mg L−1 Cd2+ as a sensitizer. A limit of detection of 0.9 ng L−1 and repeatability (RSD) of 2% at 100 ng L−1 were achieved. Interferencenfrom inorganic acids (HNO3, HCl, H2SO4, and HF) was investigated with respect to analytical application to real samples. The accuracy and practical feasibility of this ultrasensitive methodology was successfully verified by analysis of Certified ReferencenMaterial CTA-FFA-1 (Fine Fly Ash) and six natural water samples with low W concentrations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/GJ19-17604Y" target="_blank" >GJ19-17604Y: Nové analytické přístupy ke stanovení přechodných kovů založené na generování těkavých specií a atomové fluorescenční spektrometrii</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Analytical Chemistry

ISSN

0003-2700

e-ISSN

—

Svazek periodika

91

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

13306-13312

Kód UT WoS článku

000491219900090

EID výsledku v databázi Scopus

2-s2.0-85073182859