Separation and analysis of lanthanides by isotachophoresis coupled with inductively coupled plasma mass spectrometry.

Laurent Vio (1, 2) , Gérard Crétier (3) , Frédéric Chartier (4) , Valérie Geertsen (5) , Alkiviadis Gourgiotis (2) , Hélène Isnard (2) , Jean-Louis Rocca (1)

1 ISA - Institut des Sciences Analytiques
2 LANIE - Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire
3 TECHSEP - TECHniques de SEParations (2011-2014)
4 SECR - Service d'Etudes du Comportement des Radionucléides
5 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire

This study is a large project initiated by the French Nuclear Agency, and concerns the development of a new electrolyte system for the separation of lanthanides by isotachophoresis. This new system is based on a leading electrolyte that incorporates 2-hydroxy-2-methylbutyric acid as complexing agent. The optimization of separation conditions (complexing agent concentration, pH, capillary dimensions, injection conditions, and current intensity) performed by experiments on a commercial capillary instrument with contactless conductivity detection, which allows to improve the separation of 13 lanthanides (La to Lu, except Pm and Ho). We have also directly coupled the isotachophoresis to an inductively coupled plasma mass spectrometer to visualize the mono-elementary elution bands and demonstrate the potentiality of the method for isotope ratio measurements. The application to a simulated solution representative of a fraction of fission products present in a MOX spent fuel is presented in this paper to demonstrate the possible application in future on nuclear fuel samples.

Mots clés: Isotachophoresis; Inductively coupled plasma mass spectrometry; Coupled techniques; Lanthanides; Fission products; Nuclear industry; PERFORMANCE LIQUID-CHROMATOGRAPHY; SPENT NUCLEAR-FUELS; CAPILLARY-ZONE-ELECTROPHORESIS; RARE-EARTH IONS; IRRADIATED TANTALUM TARGET; ICP-MS; SPALLATION REACTIONS; FISSION-PRODUCTS; ACTINIDES; SAMPLES

Domaines: Chimie analytique

Laurent Vio, Gérard Crétier, Frédéric Chartier, Valérie Geertsen, Alkiviadis Gourgiotis, et al.. Separation and analysis of lanthanides by isotachophoresis coupled with inductively coupled plasma mass spectrometry.. Talanta, 2012, 99, pp.586-593. ⟨10.1016/j.talanta.2012.06.041⟩. ⟨hal-00876090⟩