С.А. Светов, А.В. Степанова, С.Ю. Чаженгина, Е.Н. Светова, З.П. Рыбникова, А.И. Михайлова, А.С. Парамонов, В.Л. Утицына, М.В. Эхова, В.С. Колодей.
Прецизионный (ICP-MS, LA-ICP-MS) анализ состава горных пород и минералов: методика и оценка точности результатов на примере раннедокембрийских мафитовых комплексов
S.A. Svetov, A.V. Stepanova, S.Y. Chazhengina, E.N. Svetova, Z.P. Rybnikova, A.I. Mikhailova, A.S. Paramonov, V.L. Utitsyna, M.V. Ekhova, B.S. Kolodey.
Precision geochemical (ICP-MS, LA-ICP-MS) analysis of rock and mineral composition: the method and accuracy estimation in the case study of early precambrian mafic complexes // Transactions of Karelian Research Centre of Russian Academy of Science. No 7. Precambrian Geology Series. 2015. Pp. 54-73
Keywords: mass spectrometry; inductively coupled plasma; laser ablation; quality of chemical analysis
The application of inductively coupled plasma mass spectrometry (ICP-MS) is discussed in the case study of Precambrian mafic and ultramafic rocks of eastern Fennoscandian shield and their mineral components. Determination of bulk probe sample composition is reported to be possible using both the chemical digestion of samples and in situ laser ablation (LA-ICP-MS). The accuracy of the analyses was monitored by analyzing the USGS standard BHVO-2, Russian standard SGD-1A, and in-house reference materials. The composition and measurement results of in-house reference materials С-1412, KN1 and KK1 are presented. The effect of ablation modes on the accuracy and reproducibility of LA-ICP-MS elemental concentration analysis was explored for standards, minerals and rocks. The sensitivity of the method is indicated to depend not only on the physicochemical properties of the samples (melting temperature, volatility), but also on the ablation mode and analysis procedure.
