Issue 11, 2023

Iron, copper and zinc isotope compositions of biological reference materials determined by MC-ICP-MS

Abstract

The transition metals Fe, Cu and Zn are the key elements for life, and their isotope compositions are expected to be a new index to estimate the trophic level of organisms and diagnose human diseases. Therefore, it is important to analyse these isotopes precisely and accurately in biological samples with low Fe, Cu and Zn abundances. In this study, we modify the one-column method to purify Cu–Fe–Zn for isotope analysis. The parameters that could affect the accuracy and precision of isotopic measurement were evaluated. The Fe, Cu and Zn isotope values of nine biological reference materials are reported, including plants, marine and terrestrial animals, human hair and serum. The isotope compositions of plant and marine animal organs are different from terrestrial animals and human organs. The variation ranges of δ56Fe, δ65Cu and δ66Zn from plant and marine animals are −1.23‰ to 0.11‰, 0.39‰ to 0.53‰ and 0.28‰ to 0.87‰, respectively, while those from terrestrial animals and human tissues are −2.40‰ to 0.06‰, −0.33‰ to 2.76‰ and −0.65‰ to 0.24‰, respectively. This one-column method is important to provide comprehensive isotope information for biological individuals and efficient study Fe, Cu and Zn isotope distribution in paleontology and biomedicine fields.

Graphical abstract: Iron, copper and zinc isotope compositions of biological reference materials determined by MC-ICP-MS

Supplementary files

Article information

Article type
Paper
Submitted
18 Mha 2023
Accepted
02 Nhl 2023
First published
03 Nhl 2023

J. Anal. At. Spectrom., 2023,38, 2365-2377

Iron, copper and zinc isotope compositions of biological reference materials determined by MC-ICP-MS

R. Guo, H. Yu, S. Fang, Z. Xiao and F. Huang, J. Anal. At. Spectrom., 2023, 38, 2365 DOI: 10.1039/D3JA00281K

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