Precise determination of Sm, Nd concentrations and Nd isotopic compositions at the nanogram level in geological samples by thermal ionization mass spectrometry

Analysis of cesium isotope compositions in environmental samples by thermal ionization mass spectrometry – 1. A preliminary study for source analysis of radioactive contamination in Fukushima prefecture

“…Use of a TaO activator was initially reported for the isotope ratio analysis of Sr and Rb [10], and the application has since been reported for other elements such as Ca [11], Ra [12], and Nd [13]. In the current study, the use of a TaO activator resulted in at least 100 times increase in the intensity of ion beams.…”

Geochronological and geochemical constraints on the petrogenesis and geodynamic setting of the Qianlishan granitic pluton, Southeast China

“…Rb, Sr, and the REEs were separated from the matrix elements with cation exchange columns packed with 2 m L A G 5 0 W-X 1 2 r e s i n s ( 2 0 0 -4 0 0 m e s h ) . Subsequently, Nd and Sm were separated from the other REEs with either HEHEHP chromatographic columns or Eichrom-LN columns (Chu et al 2009). Procedural blanks were less than 100 pg for Rb, less than 200 pg for Sr, less than 20 pg for Sm, and less than 50 pg for Nd.…”

“…Sr and Nd isotopes were determined using a single tungsten filament with TaF 5 as an ionization activator. Nd isotopes were determined as NdO + (Chu et al 2009). The measured 87 Sr/ 86 Sr and 143 Nd/ 144 Nd ratios were corrected for mass-fractionation using 86 Sr/ 88 Sr = 0.1194 and 146 Nd/ 144 Nd = 0.7219, respectively.…”

Multiple stages of hydrothermal REE remobilization recorded in fluorapatite in the Paleoproterozoic Yinachang Fe–Cu–(REE) deposit, Southwest China

“…The Sm-Nd isotopic compositions were analyzed at IGGCAS, following the analytical procedures described by Chu et al (2009). About 100 mg of powder was weighed into a 7 ml Savillexe Teflon beaker, and the appropriate amount of mixed 149 Sm-150 Nd spike was added.…”