Bottom-up measurement uncertainty evaluation for Cr(III) and Cr(VI) speciation in natural water by HPLC-ICP-MS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73633550" target="_blank" >RIV/61989592:15310/25:73633550 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0026265X25005442" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0026265X25005442</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.microc.2025.113190" target="_blank" >10.1016/j.microc.2025.113190</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bottom-up measurement uncertainty evaluation for Cr(III) and Cr(VI) speciation in natural water by HPLC-ICP-MS

Popis výsledku v původním jazyce

The monitoring of Cr(III) and Cr(VI) in natural waters is essential for the assessment of chromium-based levels that deteriorate the water quality and adversely affect aquatic biota. The evaluation of the uncertainty of this monitoring is crucial for the determination of their fitness for purpose and for the objective interpretation of the quantitative information. There is a great need for a detailed bottom-up evaluation of the uncertainty of Cr(III) and Cr(VI) measurements in natural waters by ion-exchange high-performance liquid chromatography inductively coupled plasma mass spectrometry. Detailed models of the uncertainty of sample dilution, calibrator preparation and sample signal interpolation in a weighted calibration curve are proposed. The models proved adequate from the metrological compatibility between reference and estimated concentrations of spiked river waters. Measurement of Cr(III) and Cr(VI) above 0.98 mu g L-1 and 0.5 mu g L-1 with relative expanded uncertainties as low as 4.0%, and 2.3%, respectively, can be achieved. For not diluted samples, calibrators&apos; values and sample signal interpolation are responsible for between 14% and 82% or 18% and 85% of the uncertainty. The analysis of a certified reference material proved that the Cr(III)/Cr(VI) interconversion during analytical work is negligible. The developed measurement models were successfully applied to the analysis of river waters and groundwater collected in the Czech Republic. Only Cr(III) at the concentration levels around 1 mu g L-1 was detected in the river samples, whereas a toxic Cr(VI) was determined in groundwater. The proposed validated methodology and user-friendly spreadsheet for the detailed evaluation of measurement uncertainty can be generally applied to other speciation approaches, where the separation techniques are hyphenated with either organic or elemental mass spectrometry.

Název v anglickém jazyce

Bottom-up measurement uncertainty evaluation for Cr(III) and Cr(VI) speciation in natural water by HPLC-ICP-MS

Popis výsledku anglicky

The monitoring of Cr(III) and Cr(VI) in natural waters is essential for the assessment of chromium-based levels that deteriorate the water quality and adversely affect aquatic biota. The evaluation of the uncertainty of this monitoring is crucial for the determination of their fitness for purpose and for the objective interpretation of the quantitative information. There is a great need for a detailed bottom-up evaluation of the uncertainty of Cr(III) and Cr(VI) measurements in natural waters by ion-exchange high-performance liquid chromatography inductively coupled plasma mass spectrometry. Detailed models of the uncertainty of sample dilution, calibrator preparation and sample signal interpolation in a weighted calibration curve are proposed. The models proved adequate from the metrological compatibility between reference and estimated concentrations of spiked river waters. Measurement of Cr(III) and Cr(VI) above 0.98 mu g L-1 and 0.5 mu g L-1 with relative expanded uncertainties as low as 4.0%, and 2.3%, respectively, can be achieved. For not diluted samples, calibrators&apos; values and sample signal interpolation are responsible for between 14% and 82% or 18% and 85% of the uncertainty. The analysis of a certified reference material proved that the Cr(III)/Cr(VI) interconversion during analytical work is negligible. The developed measurement models were successfully applied to the analysis of river waters and groundwater collected in the Czech Republic. Only Cr(III) at the concentration levels around 1 mu g L-1 was detected in the river samples, whereas a toxic Cr(VI) was determined in groundwater. The proposed validated methodology and user-friendly spreadsheet for the detailed evaluation of measurement uncertainty can be generally applied to other speciation approaches, where the separation techniques are hyphenated with either organic or elemental mass spectrometry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

MICROCHEMICAL JOURNAL

ISSN

0026-265X

e-ISSN

1095-9149

Svazek periodika

212

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

"113190-1"-"113190-7"

Kód UT WoS článku

001441408600001

EID výsledku v databázi Scopus

2-s2.0-85219362080