Bismuth fire assay preconcentration and empirical coefficient LA-ICP-MS for the determination of ultra-trace Pt and Pd in geochemical samples.

ABSTRACT: In this work, a novel method of solid sample pretreatment technique of bismuth fire assay (Bi-FA) combined with solid sample determination by laser ablation ICP-MS (LA-ICP-MS) was reported for the determination of ultra-trace Pt and Pd in geochemical samples. Bismuth oxide (Bi₂O₃) was used as fire assay collector to directly enrich Pt and Pd from solid samples, and Ag protection cupellation was employed to generate Ag granules. After cleaning, weighing and annealing, the Ag granules were compressed into thin slices and determined by LA-ICP-MS for ¹⁹⁵Pt, ¹⁰⁵Pd and ¹⁰⁹Ag (¹⁰⁹Ag was selected as the internal standard isotope). Bi₂O₃ provided exceptionally low blanks compared to nickel oxide and lead oxide c

SUBMITTER: Ni W 

PROVIDER: S-EPMC9262985 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature