Details

Autor(en) / Beteiligte

• Laycock, Adam
• Coles, Barry
• Kreissig, Katharina
• Rehkämper, Mark

Titel

High precision 142 Ce/ 140 Ce stable isotope measurements of purified materials with a focus on CeO 2 nanoparticles

Ist Teil von

• Journal of analytical atomic spectrometry, 2016, Vol.31 (1), p.297-302

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Engineered CeO 2 nanoparticles (NPs) are becoming increasingly prevalent in consumer products and this has raised concerns about the unknown behaviour and fate of such materials in the environment. Analytical limitations have hampered the detection of CeO 2 NPs in natural systems at environmentally relevant levels. This study presents data on the inherent stable isotope composition of commercially available purified Ce materials with a particular focus on CeO 2 NPs. The aim of this investigation is to determine whether CeO 2 NPs posses a distinct isotopic signature that may be exploited for their detection in natural systems. To achieve this, suitable stable isotope measurement protocols were developed for the precise determination of the 142 Ce/ 140 Ce isotope ratio by multiple collector ICP-MS using Ba for external normalisation of the instrumental mass bias. The data presented show that precisions of ±0.01‰ (2se) and ±0.04‰ (2sd) can be routinely achieved with these techniques. The results also demonstrate that commercially available CeO 2 NPs do not have a distinct Ce isotope composition that may be exploited for the purpose of stable isotope tracing.