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Inter-comparison of stable iron, copper and zinc isotopic compositions in six reference materials of biological origin
- Source :
- Talanta, 221, Talanta, Talanta, 2021, 221, pp.121576. ⟨10.1016/j.talanta.2020.121576⟩
- Publication Year :
- 2020
-
Abstract
- There is a lack of certified reference materials with an organic matrix for which metal isotope ratios have been certified. Here, we have determined the iron, copper and zinc stable isotopic compositions for six reference materials of biological origin with diverse matrices, i.e. BCR-380R (whole milk), BCR-383 (beans), ERM-CE464 (tuna fish), SRM-1577c (bovine liver), DORM-4 (fish protein) and TORT-3 (lobster hepatopancreas) in three different labs. The concentrations for six major and sixteen trace elements, spanning almost four orders of magnitude, were also measured and the results obtained show an excellent agreement with certified values, demonstrating that the dissolution step was quantitative for all the standards. By taking literature data into account, 39 possible pair-wise comparisons of mean iron, copper and zinc isotopic values (δ values) could be made. Results of Tukey multiple comparisons of means yielded 11 significantly different pairs. Most of these differences are of the same order of magnitude as the estimated mean expanded uncertainties (U, k = 2) (±0.10‰, ±0.05‰, and ±0.05‰ for the δ56Fe, δ65Cu and δ66Zn values, respectively). The present inter-comparison study finally proposes nineteen new preferred values for the Cu, Zn and Fe isotopic compositions of six reference materials of biological origin.<br />SCOPUS: ar.j<br />info:eu-repo/semantics/published
- Subjects :
- Iron
Analytical chemistry
chemistry.chemical_element
02 engineering and technology
Fractionation
Zinc
01 natural sciences
Analytical Chemistry
Blood serum
Isotopes
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry
Animals
Chimie
Orders of magnitude (data)
Isotope
Stable isotope ratio
010401 analytical chemistry
021001 nanoscience & nanotechnology
Copper
Stable isotope
Trace Elements
0104 chemical sciences
Certified reference materials
chemistry
Cattle
Reference material
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 00399140
- Database :
- OpenAIRE
- Journal :
- Talanta, 221, Talanta, Talanta, 2021, 221, pp.121576. ⟨10.1016/j.talanta.2020.121576⟩
- Accession number :
- edsair.doi.dedup.....0a0e397ae1cbd7bde40d820959778e76