TY  - JOUR
A1  - Weber, Michael
A1  - Lugli, Federico
A1  - Hattendorf, Bodo
A1  - Scholz, Denis
A1  - Mertz-Kraus, Regina
A1  - Guinoiseau, Damien
A1  - Jochum, Klaus Peter
T1  - NanoSr – A New Carbonate Microanalytical Reference Material for In Situ Strontium Isotope Analysis
Y1  - 2019
VL  - 44
IS  - 1
SP  - 69
EP  - 83
JF  - Geostandards and Geoanalytical Research
DO  - 10.1111/ggr.12296
DO  - 10.23689/fidgeo-5085
N2  - The in situ measurement of Sr isotopes in carbonates by MC-ICP-MS is limited by the availability of suitable microanalytical reference materials (RMs), which match the samples of interest. Whereas several well-characterised carbonate reference materials for Sr mass fractions > 1000 µg g−1 are available, there is a lack of well-characterised carbonate microanalytical RMs with lower Sr mass fractions. Here, we present a new synthetic carbonate nanopowder RM with a Sr mass fraction of ca. 500 µg g−1 suitable for microanalytical Sr isotope research (‘NanoSr’). NanoSr was analysed by both solution-based and in situ techniques. Element mass fractions were determined using EPMA (Ca mass fraction), as well as laser ablation and solution ICP-MS in different laboratories. The 87Sr/86Sr ratio was determined by well-established bulk methods for Sr isotope measurements and is 0.70756 ± 0.00003 (2s). The Sr isotope microhomogeneity of the material was determined by LA-MC-ICP-MS, which resulted in 87Sr/86Sr ratios of 0.70753 ± 0.00007 (2s) and 0.70757 ± 0.00006 (2s), respectively, in agreement with the solution data within uncertainties. Thus, this new reference material is well suited to monitor and correct microanalytical Sr isotope measurements of low-Sr, low-REE carbonate samples. NanoSr is available from the corresponding author.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9431
ER  -