Details
Accurate whole-rock geochemistry analysis by combined ICP-OES and LA-ICP-MS instruments

Accurate whole-rock geochemistry analysis by combined ICP-OES and LA-ICP-MS instruments

Authors
Gönenç GÖÇMENGIL, Fatma ŞİŞMAN TÜKEL, Fulya UZUN, Marcel GUILLONG, Isak YILMAZ, Namık AYSAL, Nurullah HANİLÇİ

Keywords
LA-ICP-MS, Geochemistry, ICP-OES, Whole-rock Geochemistry

Abstract
ICP-OES and LA-ICP-MS instruments are routinely used to assess the geochemical properties of the various natural and synthetic materials. In this contribution the analytical routines and method development procedures of the ICP-OES and LA-ICP-MS facilities installed at the Istanbul University-Cerrahpaşa Geological Engineering Department, Geochronology and Geochemistry Laboratory have been evaluated using well-known international rock standards. Sample preparation techniques, method development, experimental setup, and measurement conditions for the both ICP-OES and LA-ICP-MS instruments were discussed and specific analyze results of NIST SRM 614, BCR-2, AGV-2, BCR-2G, and AGV-2G evaluated. Flux-free USGS glass standards produced by in-house techniques and fluxbearing glasses produced by fusion of sample with the mixture of ultra-pure lithiumtetraborate, lithium metaborate, and lithiumbromide are evaluated and compared with the well-known reference values in the literature. Relative standard deviation (RSD) values for the major oxide measurements for standards given range of 0.0 wt. % to 1.5 wt. %. RSD values for the trace and rare-earth-elements values are mainly lower than 10 wt. %. The results confirm that both flux-bearing and flux-free glasses reasonably match with the worldwide inter-laboratory values for international standards samples. The combination of these two instruments can be used to conduct the geochemistry of various solid earth materials.

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