[A New Sample Fusion Technique for Quantitative Analysis of Major and Minor Elements in Sulfides with X-Ray Fluorescence Spectrometry and Laser Ablation Inductively Coupled Plasma Mass Spectrometry].

A new sample fusion method for sulfides has been developed in this study. HNO3 was used as a short pre-oxidation reagent instead of the traditional solid oxidant (e.g., NaNO3, KNO3), which avoid the erosion of the platinum crucible. GeO2 was also added in samples to avoid the break of glass beads. The good analytical precisions of X-ray fluorescence spectrometry (RSD<5.6%, 1σ) and laser ablation inductivity coupled plasma mass spectrometry (RSD<3%, 1σ) demonstrated that the major elements were homogeneously distributed in the fused beads of sulfides. The determined major and minor elements (Si, Al, Fe, Mg, K, Ca, Na, Mn, Cu and Zn) values by using XRF and LA-ICP-MS are in excellent agreement with published values in three reference sulfide standards(reference values for Ti were absent). These results clearly demonstrate that the present fusion technique is well suitable for routine sulfide sample preparation for both XRF and LA-ICP-MS analysis.