RADIOCARBON DATING ON <i>ECHO</i>MICADAS, LSCE, GIF-SUR-YVETTE, FRANCE: NEW AND UPDATED CHEMICAL PROCEDURES
Christine Hatté, Maurice Arnold, Arnaud Dapoigny, Valérie Daux, Georgette Delibrias, Diane Du Boisgueheneuc, Michel Fontugne, Caroline Gauthier, M. T. Guillier, Jérémy Jacob, Michel Jaudon, Évelyne Kaltnecker, J. Labeyrie, Claude Noury, Martine Paterne, Monique Pierre, Brian Phouybanhdyt, Jean-Jacques Poupeau, Jean-François Tannau, François Thil, Nadine Tisnérat‐Laborde, Hélène Valladas
Abstract
ABSTRACT The Laboratoire des Sciences du Climat et de l’Environnement (LSCE) has operated a radiocarbon dating laboratory for almost 70 years. It has evolved from a traditional ß-decay counting to an accelerator mass spectrometry facility. In 2015, the LSCE received a major upgrade with the installation of a MICADAS. This evolution required adjustments in sample preparation to match the new capability to date samples as small as a few tens of µgC. We summarize here the sample cleaning procedures and the chemical purification or extraction treatment that we apply to the samples. We also report values of blank and reference materials of different matrices that match the large diversity of samples handled at LSCE.