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, Exactly 50 µL of this solution was diluted with 5 mL, resulting in dilution factors of ?1000x. Detection limits are around 0.1 ppt, or approximately 0.1 ppb in the original sample. Standardisation was performed by correction to a series of synthetic solutions containing trace elements at the 500, 100, 10, 1, and 0.1 ppb levels. In addition, the USGS standard BHVO-2 was employed as an internal standard to account for oxide production on the REE masses. These solutions were introduced via a glass nebuliser to a Peltier-cooled glass spray chamber coupled to an Agilent 7900 quadrupole ICP-MS system at the Institut de Physique du Globe de, REE Measurements A five % fraction of the initially dissolved CAI was conserved for trace element analysis. This aliquot was dried down in 15 M HNO3 and taken up in 2 mL 2% HNO3 in preparation for mass spectrometric analysis
The data that support the plots within this paper and other findings of this study ,
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