Jump to main content
Jump to site search


Determination of isotope fractionation of Cr(iii) during oxidation by LC/low-resolution MC-ICPMS

Author affiliations

Abstract

A robust and sensitive method for the precise isotopic analysis of 53Cr/50Cr during Cr(III) oxidation by coupling ion pair reversed-phase chromatography and Multicollector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is presented. The effective separation of Cr(III) and Cr(VI) species from a sample matrix by HPLC enables on-line isotopic determination of the 53Cr/50Cr ratio in transient signals by MC-ICPMS, without the laborious off-line and time consuming sample preparation step associated with a high probability of speciation changes. Mass discrimination and instrument drift were corrected by the sample-standard bracketing method using the 53Cr/50Cr isotope ratio of SRM 979 as the standard. The obtained results show good precision but are still approximately two-three times worse than the high precision results achieved by TIMS and MC-ICPMS with off-line Cr separation. Robustness, acceptable precision and accuracy, as well as a minimum possibility of sample contamination, of the developed analytical method have been demonstrated in complex natural samples of natural water (IAPSO standard water) and a standard spiked with several metal ions.

Graphical abstract: Determination of isotope fractionation of Cr(iii) during oxidation by LC/low-resolution MC-ICPMS

Back to tab navigation

Article information


Submitted
19 Nov 2019
Accepted
23 Jan 2020
First published
03 Feb 2020

J. Anal. At. Spectrom., 2020, Advance Article
Article type
Paper

Determination of isotope fractionation of Cr(III) during oxidation by LC/low-resolution MC-ICPMS

J. Karasiński, C. T. Nguyen-Marcińczyk, M. Wojciechowski, E. Bulska and L. Halicz, J. Anal. At. Spectrom., 2020, Advance Article , DOI: 10.1039/C9JA00388F

Social activity

Search articles by author

Spotlight

Advertisements