Cadmium isotopic composition of biogenic certified reference materials determined by thermal ionization mass spectrometry with double spike correction

0532956 - GLÚ 2021 RIV NL eng J - Journal Article
Borovička, Jan - Ackerman, Lukáš - Rejšek, Jan
Cadmium isotopic composition of biogenic certified reference materials determined by thermal ionization mass spectrometry with double spike correction.
Talanta. Roč. 221, January (2021), č. článku 121389. ISSN 0039-9140. E-ISSN 1873-3573
R&D Projects: GA ČR(CZ) GA19-06759S
Institutional support: RVO:67985831
Keywords : Cadmium isotopes * TIMS * Standard reference materials * NIST SRM 3108 * NIST SRM 1566b * Biota
OECD category: Analytical chemistry
Impact factor: 6.556, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0039914020306809

A¹¹⁶Cd–¹⁰⁶Cd double-spike method in combination with thermal ionization mass spectrometry (TIMS) was applied to obtain cadmium (Cd) mass fractions and stable isotope compositions in seven biogenic certified reference materials (pine needles, tomato leaves, spinach leaves, lichen, mussel tissue, oyster tissue, and pig kidney). This sample set was supplemented by the analysis of two manganese nodules and one soil reference material for which the Cd isotopic data has already been reported. The intermediate measurement precision of the whole protocol as determined for the NIST SRM 3108 Cd standard solution yields an excellent value of δ¹¹⁴/¹¹⁰Cd of -0.005 ± 0.029‰ (2SD, n = 47). The Cd isotopic compositions of the biogenic materials, reported as δ¹¹⁴/¹¹⁰Cd relative to NIST SRM 3108, range from -0.52 to +0.50‰. Plants show δ¹¹⁴/¹¹⁰Cd mean values ranging from -0.09 to +0.45‰ whereas the δ¹¹⁴/¹¹⁰Cd value of -0.17‰ was detected in the lichen and the values of -0.51, -0.52, and +0.47‰ were gathered for the oyster, mussel, and pig kidney tissues, respectively. The observed large variation of the δ¹¹⁴/¹¹⁰Cd values in the biogenic reference materials indicates a potential to use the natural mass-dependent Cd isotope fractionation in environmental, biogeochemical, and physiological studies.
Permanent Link: http://hdl.handle.net/11104/0314708