Separation of Ce from other rare-earth elements with application to SmNd and LaCe chronometry

The Sm-Nd isotopic method in the geochronology laboratory of the University of Brasília

“…As already observed in other studies (Getty et al 1993, Rehkamper et al 1996 and Sato 1998), we had successful attacks using Savilex capsules. Some samples, however, such as garnet-rich rocks and some ultramaphic rocks were not entirely dissolved and needed to be transferred to bombs.…”

Re-evaluating 142Nd/144Nd in lunar mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon

“…The REE fraction was separated using an LNSpec column to separate Nd, Sm, and Lu. The Nd cut was further purified by solvent extraction to remove Ce (Rehkamper et al, 1996) followed by a cation exchange chromatography separation to remove Na that was introduced as sodium bromate in the solvent extraction procedure, followed by a second pass through the LN-Spec column. For the Sm-Nd spiked aliquots in the first analytical campaign, and the unspiked samples in the second analytical campaign, where no Lu and Hf were collected, the ion exchange procedure started with the cation column, and the anion and LN-Spec columns that preceded the cation column were not necessary.…”

Improved Nd chemical separation technique for 143Nd/144Nd analysis in geological samples using packed Ln resin columns

“…The recovery yield of Nd after the entire separation process was always better than 90%, which is better than the recovery realized in previous studies owing to the collection of wider Nd elution points by the effective removal of neighbour elution elements (Ce and Sm). The Ln resin column (e.g., Peppard et al, 1957;Rehkämper et al, 1996).This method can also be used to purify Ce for Ce isotope ratio measurement (Tazoe et al, 2007). However, further purification of Ce is necessary before the Ce isotope ratio measurements can be conducted; this will be described in a separate paper.…”

“…The recovery yield of Nd after the entire separation process was always better than 90%, which is better than the recovery realized in previous studies owing to the collection of wider Nd elution points by the effective removal of neighbour elution elements (Ce and Sm). The Ln resin column (e.g., Peppard et al, 1957;Rehkämper et al, 1996).…”

“…The detection of eluted elements was performed using an inductively coupled plasma quadrupole mass spectrometer (ICP-QMS, Agilent 7500). 1957;Rehkämper et al, 1996;Tazoe et al, 2007). For the oxidative separation, a disposable column (Micro Bio-Spin Chromatography column, Bio-Rad Laboratories) packed with 0.5 ml of Ln resin was used.…”