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Platinum‐Group Elements and Gold Determination in NiS Fire Assay Buttons by UV Laser Ablation ICP‐MS
Author(s) -
Jorge Alexandre P.de S.,
Enzweiler Jacinta,
Shibuya Elisa K.,
Sarkis Jorge E.S.,
Figueiredo Ana Maria G.
Publication year - 1998
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1998.tb00544.x
Subject(s) - nickel sulfide , analytical chemistry (journal) , laser ablation , platinum group , chemistry , platinum , detection limit , sulfide , nickel , laser , copper , ablation , quartz , materials science , chromatography , metallurgy , optics , physics , biochemistry , organic chemistry , catalysis , engineering , aerospace engineering
The direct analysis of nickel sulfide fire assay buttons by UV laser ablation ICP‐MS was used to determine the platinum‐group elements and gold in the following reference materials: UMT‐1, WPR‐1, WMG‐1, GPt‐4, GPt‐6 and CHR‐Bkg. The instrument was calibrated with buttons prepared using quartz doped with the appropriate standard solutions. Analytical precision (RSD) was generally better than 10%, although occasional higher RSDs may infer local heterogeneities within nickel sulfide buttons. Good or excellent agreement was observed between analysed and reference material values except Rh in UMT‐1 and WMG‐1, which suffered an interference from copper. Detection limits calculated as 10 s quantitation limits were Au (1.7 ng g −1 ), Pd (3.3 ng g −1 ), Pt (8.3 ng g −1 ), Os (1.3 ng g −1 ), Rh (1 ng g −1 ), Ru (5 ng g −1 ) and Ir (0.7 ng g −1 ).