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Title: Systematic evaluation of a strontium-specific extraction chromatographic resin for obtaining a purified Sr fraction with quantitative recovery from complex and Ca-rich matrices
Authors: De Muynck, David ×
Huelga-Suarez, Gonzalo
Van Heghe, Lana
Degryse, Patrick
Vanhaecke, Frank #
Issue Date: 2009
Publisher: Royal Society of Chemistry
Series Title: Journal of Analytical Atomic Spectrometry vol:24 pages:1498-1510
Abstract: This paper presents a systematic evaluation of a commercially available strontium-specific
extraction chromatographic resin based on a crown ether (Sr spec), for use in applications of
Sr isotope ratio analysis dealing with samples displaying a complex and/or Ca-rich matrix composition.
A protocol, consisting of (i) loading a sample digest in 7 M HNO3 onto the resin, (ii) rinsing the resin
with 7MHNO3 to remove concomitant matrix elements and (iii) rinsing the resin with 0.05MHNO3 to
strip off the purified Sr fraction, was found to provide the best results. The performance in terms of
(i) the purity of the Sr fraction obtained, (ii) the efficiency of Rb/Sr and Ca/Sr separation, (iii) the Sr
recovery from samples with a complex and Ca-rich matrix composition and (iv) the Sr isotope ratios
obtained using multi-collector ICP-MS, was evaluated for various amounts (250, 500, 750 and 2000 mL)
of resin using digests of bone and soil certified reference materials, dental tissues, fluorite and glass
samples. Further, it was investigated whether or not the isolation protocol introduces Sr isotopic
fractionation. Also the possibility of regenerating the resin after use, allowing multiple use of the resin,
was assessed. Finally, the Sr isotopic composition of 2 bone (NIST SRM 1400 Bone Ash and NIST
SRM 1486 Bone Meal) and 2 soil (BCR CRM 141 Calcareous Loam Soil and BCR CRM 142
Light Sandy Soil) certified reference materials was determined. The method was shown to be
fit-for-purpose for population migration studies and provenancing of archaeological artefacts, and
is expected to be suited for a broad range of Sr isotope ratio applications.
ISSN: 0267-9477
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Geology
× corresponding author
# (joint) last author

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