Determination of trace elements in geological samples by laser ablation inductively coupled plasma mass spectrometry

摘要

Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was applied for the sensitive multi-element analysis of traces and ultra-traces in geological samples. In order to prepare homogeneous targets the powdered geological samples were melted together with a lithium-borate mixture (90% Li_2B_4O_7, 10% LiBO_2) in a muffle furnace at 1050 deg C. The quantification of the analysis results was carried out using the BCR-2G and BM standard reference material (SRM). The experimentally determined relative sensitivity coefficients (RSC) for both SRMs vary between 0.2 and 3 for most of the elements, whereas the relative standard deviation (RSD) of the determination (N = 3) of the concentration was 5-20%. The analysis results of LA-ICP-MS for various geological samples are in agreement with those of other methods.