Platinum stable isotope analysis of geological standard reference materials by double-spike MC-ICPMS.

ABSTRACT: We report a method for the chemical purification of Pt from geological materials by ion-exchange chromatography for subsequent Pt stable isotope analysis by multiple-collector inductively coupled plasma mass spectrometry (MC-ICPMS) using a ¹⁹⁶Pt-¹⁹⁸Pt double-spike to correct for instrumental mass bias. Double-spiking of samples was carried out prior to digestion and chemical separation to correct for any mass-dependent fractionation that may occur due to incomplete recovery of Pt. Samples were digested using a NiS fire assay method, which pre-concentrates Pt into a metallic bead that is readily dissolved in acid in preparation for anion-exchange chemistry. Pt was recovered from anion-exchange resin in concentrated HNO₃ acid after elution of matrix elements,

SUBMITTER: Creech JB 

PROVIDER: S-EPMC4326679 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature