Jump to main content
Jump to site search

Issue 5, 2018
Previous Article Next Article

The combined measurement of 87Sr/86Sr isotope ratios and 88Sr/85Rb elemental ratios using laser ablation MC-ICP-MS and its application for food provenance studies: the case for Asturian beans

Author affiliations

Abstract

The spectral interference of 87Rb on 87Sr for the measurement of 87Sr/86Sr isotope ratios in solid samples by laser ablation multicollector (MC)-ICP-MS could be corrected by combining the transient signal of the sample with a Rb pulse from the nebulisation of a pure Rb standard. This dual sample introduction system, combined with a multiple linear regression data treatment procedure, allowed the interference free measurement of the 87Sr/86Sr isotope ratio in solid samples. Additionally, when the signals for Rb and Sr could be separated in time, even only partially, the application of the multiple linear regression procedure allowed us to compute also the 87Sr/86Sr isotope ratio free of spectral interference. The fact that Sr was concentrated in the seed coat of beans, whereas Rb was mainly present in the cotyledon, allowed us to develop a laser ablation multicollector ICP-MS procedure for the authentication of Asturian beans which are subject to fraud with the import of South American beans. By combining the 87Sr/86Sr isotope ratio with the 88Sr/85Rb elemental ratio we were able to distinguish between Asturian and South American beans in spite of the large 87Sr/86Sr isotopic variability of Asturian beans.

Graphical abstract: The combined measurement of 87Sr/86Sr isotope ratios and 88Sr/85Rb elemental ratios using laser ablation MC-ICP-MS and its application for food provenance studies: the case for Asturian beans

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Feb 2018, accepted on 12 Apr 2018 and first published on 12 Apr 2018


Article type: Paper
DOI: 10.1039/C8JA00061A
Citation: J. Anal. At. Spectrom., 2018,33, 867-875
  •   Request permissions

    The combined measurement of 87Sr/86Sr isotope ratios and 88Sr/85Rb elemental ratios using laser ablation MC-ICP-MS and its application for food provenance studies: the case for Asturian beans

    A. Reguera-Galan, M. Moldovan and J. I. Garcia Alonso, J. Anal. At. Spectrom., 2018, 33, 867
    DOI: 10.1039/C8JA00061A

Search articles by author

Spotlight

Advertisements