High precision measurements of gallium isotopic compositions in geological materials by MC-ICP-MS

Download
  1. Get@NRC: High precision measurements of gallium isotopic compositions in geological materials by MC-ICP-MS (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1039/C6JA00202A
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
1364-5544
Volume31
Issue8
Pages16731679
AbstractAn analytical protocol for the accurate and precise determination of the gallium isotope ratio in geological materials is presented for the first time by using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Separation of Ga from natural sample matrices was achieved by using a three-column ion-exchange chromatograph with one anion exchange AG MP-1M column and two cation exchange AG 50W-X8 columns. This approach provides an efficient purification with a low blank and high yield of Ga from an excess amount of Fe existing in geological samples. The instrument mass bias was monitored and corrected by using a model of standard-sample bracketing with internal normalization, and copper was used as an internal standard which was added to both the sample and standard solutions. The long-term external reproducibility of δ71/69Ga obtained is 0.04‰ (2SD). Ga isotopic compositions of geological reference materials including basalt, andesite, rhyolite, granodiorite, soil, sediment, carbonatite and shale were measured using the proposed approach. The 71Ga/69Ga ratio in these geological reference materials spanned over a rather narrow range between 0.74‰ and 0.90‰, relative to NIST SRM 994.
Publication date
PublisherRoyal Society of Chemistry
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number23002371
Export citationExport as RIS
Report a correctionReport a correction
Record identifier1ce68535-e74d-467a-80b5-61eef3f7d4a8
Record created2017-10-24
Record modified2017-10-24
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: