Jump to main content
Jump to site search


Precise and accurate boron and lithium isotope determinations for small sample-size geological materials by MC-ICP-MS

Abstract

A low-blank, high-precision and highly reproducible technique for boron (B) and lithium (Li) isotope analyses by Multi-Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICP-MS) were developed in this study. The new analytical protocol presented here involves effective sample dissolution, simultaneous purifications of B and Li, together with high-precision B and Li isotopic determinations on silicate matrices. The sample solutions prepared from the low-temperature acid-dissolution have nearly 100% yields for B, Li, and Be. B and Li can be extracted from the same aliquot through ion chromatographic separations, followed by a modified micro-sublimation technique for further B purification. The low procedural blanks of Li and B using this new analytical protocol enable us to process silicate samples with trace amounts of B (< 80 ng) and Li (< 1 ng). The long-term external precisions of δ11B (5 ng of B) and δ7Li (1 ng of Li) are better than ± 0.35‰ (2SD) and ± 0.27‰ (2SD), respectively, based on the measurements on a series of international reference materials over the last two years. The measured δ11B and δ7Li values for the rock standards with a variety of matrices, including JR-2, JA-1, AGV-2, JB-2, BCR-2, BHVO-2, and IAEA-B5, are in excellent agreement with the published values, demonstrating the robustness of our new analytical protocols. Applying this improved technique, we are able to generate accurate and high-precision δ11B and δ7Li data for B- and Li-depleted natural samples, such as meteorite materials and ultramafic rocks, which can provide critical constraints on early solar system geochemistry and mantle compositions.

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Dec 2017, accepted on 04 Apr 2018 and first published on 04 Apr 2018


Article type: Paper
DOI: 10.1039/C7JA00400A
Citation: J. Anal. At. Spectrom., 2018, Accepted Manuscript
  •   Request permissions

    Precise and accurate boron and lithium isotope determinations for small sample-size geological materials by MC-ICP-MS

    Y. Liu, K. Huang and D. Lee, J. Anal. At. Spectrom., 2018, Accepted Manuscript , DOI: 10.1039/C7JA00400A

Search articles by author

Spotlight

Advertisements