Ultra-sensitive speciation analysis of tellurium by manganese and iron assisted photochemical vapor generation coupled to ICP-MS/MS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F22%3A00558095" target="_blank" >RIV/68081715:_____/22:00558095 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/22:10445181

Výsledek na webu

<a href="http://hdl.handle.net/11104/0331894" target="_blank" >http://hdl.handle.net/11104/0331894</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aca.2022.339634" target="_blank" >10.1016/j.aca.2022.339634</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultra-sensitive speciation analysis of tellurium by manganese and iron assisted photochemical vapor generation coupled to ICP-MS/MS

Popis výsledku v původním jazyce

Photochemical vapor generation (PVG) of Te4+ was undertaken with a simple reactor consisting of a polytetrafluoroethylene reaction coil wrapped around a low-pressure mercury tube lamp and using a flow-injection for sample delivery. The composition of a reaction medium, the influence of irradiation time and the effect of added sensitizers and interferents were investigated using high-resolution continuum source atomic absorption spectrometry and a miniature diffusion flame atomizer. A mixture of 5 M acetic acid and 3.5 M formic acid and sample flow rate of 4 mL min(-1) permitting a 36 s irradiation time were found optimal for PVG of Te4+. The addition of 250 mg L-1 Mn2+ and 15 mg L-1 Fe2+ ions as sensitizers enhanced the overall PVG efficiency 2.75-fold to 50 +/- 2%. In order to achieve higher sensitivity necessary for determination of Te in real environmental samples, PVG was coupled to inductively coupled plasma triple quadrupole mass spectrometer and detection was performed with O-2 in the re action cell utilizing a mass shift mode of measurement (m/z 128> m/z 144) to ensure interference free ion detection. A limit of detection 1.3 ng L-1 and repeatability (RSD) 0.9% at 250 ng L-1 were achieved. This ultrasensitive methodology was validated for speciation analysis of Te in water samples of various matrix complexities (fresh water, well water, seawater and contaminated water). Since no response was observed from Te6+ under optimal PVG conditions, Te4+ was selectively determined by direct PVG. The sum of Te4+ and Te6+ was determined after pre-reduction of Te6+ in 6 M HCl (95 degrees C), evaporation to dryness and reconstitution in the reaction medium containing sensitizers. Very good accuracy was demonstrated by spiked recoveries for both Te4+ and total Te in water samples and also by total Te determination in fresh water Standard Reference Material NIST 1643f. (C) 2022 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Ultra-sensitive speciation analysis of tellurium by manganese and iron assisted photochemical vapor generation coupled to ICP-MS/MS

Popis výsledku anglicky

Photochemical vapor generation (PVG) of Te4+ was undertaken with a simple reactor consisting of a polytetrafluoroethylene reaction coil wrapped around a low-pressure mercury tube lamp and using a flow-injection for sample delivery. The composition of a reaction medium, the influence of irradiation time and the effect of added sensitizers and interferents were investigated using high-resolution continuum source atomic absorption spectrometry and a miniature diffusion flame atomizer. A mixture of 5 M acetic acid and 3.5 M formic acid and sample flow rate of 4 mL min(-1) permitting a 36 s irradiation time were found optimal for PVG of Te4+. The addition of 250 mg L-1 Mn2+ and 15 mg L-1 Fe2+ ions as sensitizers enhanced the overall PVG efficiency 2.75-fold to 50 +/- 2%. In order to achieve higher sensitivity necessary for determination of Te in real environmental samples, PVG was coupled to inductively coupled plasma triple quadrupole mass spectrometer and detection was performed with O-2 in the re action cell utilizing a mass shift mode of measurement (m/z 128> m/z 144) to ensure interference free ion detection. A limit of detection 1.3 ng L-1 and repeatability (RSD) 0.9% at 250 ng L-1 were achieved. This ultrasensitive methodology was validated for speciation analysis of Te in water samples of various matrix complexities (fresh water, well water, seawater and contaminated water). Since no response was observed from Te6+ under optimal PVG conditions, Te4+ was selectively determined by direct PVG. The sum of Te4+ and Te6+ was determined after pre-reduction of Te6+ in 6 M HCl (95 degrees C), evaporation to dryness and reconstitution in the reaction medium containing sensitizers. Very good accuracy was demonstrated by spiked recoveries for both Te4+ and total Te in water samples and also by total Te determination in fresh water Standard Reference Material NIST 1643f. (C) 2022 Elsevier B.V. All rights reserved.

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

2022

Kód důvěrnosti údajů

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

Název periodika

Analytica Chimica Acta

ISSN

0003-2670

e-ISSN

1873-4324

Svazek periodika

1201

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

339634

Kód UT WoS článku

000800576000001

EID výsledku v databázi Scopus

2-s2.0-85125479035