Boron isotope ratio determination in carbonates via LA-MC-ICP-MS using soda-lime glass standards as reference material

Jan Fietzke*, Agnes Heinemann, Isabelle Taubner, Florian Böhm, Jonathan Erez, Anton Eisenhauer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

A new in situ method using LA-MC-ICP-MS (193 nm excimer laser) for the determination of stable boron isotope ratios (δ11B) in carbonates was developed. Data were acquired via a standard sample standard bracketing procedure typically providing a reproducibility of 0.5‰ (SD) for samples containing 35 ppm of boron. A single ablation interval consumed about 5 g of sample corresponding to about 0.2 ng of boron. The major finding was the similar instrumental fractionation behaviour of carbonates, soda-lime glass and sea salt with respect to boron isotopes. As no matrix induced offset was detectable between these distinct materials we propose the use of NIST glasses as internal standards for boron isotope ratio measurements via LA-MC-ICP-MS. This finding overcomes the problem of a missing matrix matched carbonate standard for in situ boron isotope studies. As a first application a set of coral samples from a culturing experiment was analysed. δ11B values range from 19.5 to 25‰ depending on the pH of the water used in the particular treatment. This is in good agreement with the results of earlier studies.

Original languageEnglish
Pages (from-to)1953-1957
Number of pages5
JournalJournal of Analytical Atomic Spectrometry
Volume25
Issue number12
DOIs
StatePublished - Dec 2010

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