Abstract
The tin mass fraction and the δ120/118Sn relative to NIST SRM 3161a were measured for ten geological reference materials among which the Sn isotopic values of W‐2a, JA‐2, JG‐2, G‐2, GBW07316, NOD‐A‐1 and SGR‐1 are reported for the first time. The sample preparation procedure implemented in this study was based on acid digestion and matrix separation by two‐stage chromatographic using AG‐MP‐1 and TRU‐Spec resin. Isotopic measurements were carried out by multi‐collector inductively coupled plasma‐mass spectrometry (MC‐ICP‐MS), using a 117Sn–119Sn double‐spike technique to correct for the instrumental mass fractionation effects. The overall precision of this method is estimated to be ± 0.03‰ (2s, n = 81) and ± 0.07‰ (2s, n = 6) for the NIST SRM 3161a and a geological reference material BHVO‐2, respectively.
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