Rapid determination of REEs and other trace elements in geological samples by microwave acid digestion and ICP-MS

摘要: A method is described for the chemical decomposition and determination of 20 geochemically significant trace elements all 14 rare earth in a few international geological reference materials using microwave acid digestion inductively coupled plasma mass spectrometry (ICP-MS). Samples about 50 mg were dissolved procedure. 103 Rh was used as an internal standard, 0.02% solution matrix-matched samples calibration standard. Detection limits most are ppt sub-ppt range. The data obtained several rock found to be good agreement with certified data. precisions achieved < 5% RSD comparable levels accuracy; cases suggesting that by ICP-MS best suited high precision geochemical studies. ability generate semiquantitative analysis nearly 70 90 sec demonstrated material. accuracy results well within 20% values. For semi-quantitative analysis, 200-ng/mL multi-element calibration. This should particularly useful when totally unknown have characterized or concentrations certain recorded large number samples.