Recent Advances in Gallium Isotope Analysis for Geological Materials using Multi-collector ICP-MS
Year: 2025
Type: article
Abstract: Gallium isotopes are a promising tool in geology and planetary science, with MC-ICP-MS enabling highprecision measurement of Ga isotopic composition.Samples are purified to remove interfering elements using two double-column and three triple-column methods, all achieving over 95% recovery with excellent reproducibility.The Neptune MC-ICP-MS, coupled with an Apex gas introduction system, achieves the highest sensitivity and requires the smallest sample consumption (80 ng Ga).The C-SSBIN method-combining sample-standard bracketing with Cu as an internal standard-delivers the highest precision and long-term stability.Two Ga isotope reference standards are available, with the solid NIST 994 standard exhibiting isotopic heterogeneity.The IPGP Ga solution demonstrates superior stability and more closely approximates natural Ga isotopic compositions, making it the preferred Ga isotope reference standard.High-precision Ga isotope measurements by MC-ICP-MS provide valuable insights for advancing Ga isotope fractionation theory and expanding its geological applications.
Source: Atomic Spectroscopy
DOI: 10.46770/as.2025.043
Author: Yu-Miao Meng
Institutions: Chinese Academy of Sciences, Institute of Geochemistry
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4413992825