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Calcium Carbonate and Phosphate Reference Materials for Monitoring Bulk and Microanalytical Determination of Sr Isotopes
Author(s) -
Weber Michael,
Lugli Federico,
Jochum Klaus Peter,
Cipriani Anna,
Scholz Denis
Publication year - 2018
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/ggr.12191
Subject(s) - laser ablation , strontium carbonate , analytical chemistry (journal) , carbonate , isotope , nist , homogeneity (statistics) , laser , chemistry , isotopes of strontium , homogeneous , mineralogy , strontium , radiochemistry , materials science , optics , physics , chromatography , nuclear physics , statistics , mathematics , organic chemistry , natural language processing , computer science , thermodynamics
In situ laser ablation analyses rely on the microanalytical homogeneity of reference materials ( RM s) and a similar matrix and mass fraction between unknown samples and RM s to obtain reliable results. Suitable carbonate and phosphate RM s for determination of Sr isotope ratios in such materials are limited. Thus, we determined 87 Sr/ 86 Sr ratios of several carbonate ( JC t‐1, JC p‐1, MACS ‐1, MACS ‐3) and phosphate ( MAPS ‐4, MAPS ‐5, NIST SRM 1400, NIST SRM 1486) international RM s using dissolved samples and two different multi‐collector inductively coupled plasma‐mass spectrometers ( MC ‐ ICP ‐ MS ). Our Sr isotope data are in agreement with published data and have an improved measurement precision for some RM s. For MACS ‐1, we present the first 87 Sr/ 86 Sr value. We tested the suitability of these materials for microanalytical analyses by LA ‐ MC ‐ ICP ‐ MS , with two different laser ablation systems: a conventional nanosecond laser and a state‐of‐the‐art femtosecond laser. We investigated the RM s micro‐homogeneity and compared the data with our solution data. Both laser ablation systems yielded identical 87 Sr/ 86 Sr ratios within uncertainty to the solution data for RM s with low interferences of REE s. Therefore, these carbonate and phosphate RM s can be used to achieve accurate and precise results for in situ Sr isotope investigations by LA ‐ MC ‐ ICP ‐ MS of similar materials.