电感耦合等离子体质谱分析通古斯大爆炸地区沉积物中超痕量铂族元素

摘要

建立了一个用酸(HF、HCl、HNO3、HClO4)溶解通古斯地区沉积物样品，以Re为内标元素，用电感耦合等离子体质谱(ICP-MS)测定其中铂族元素的分析方法。方法检出限为0.001～0.06 μg/L，回收率大于85%。用该方法分析了9个取自通古斯地区的沉积物样品，发现了Ru、Rh、Pd、Ir、Pt等元素的异常。%A method for determination of ultra-trace platinum group elements (PGEs) in the sediments near the Tunguska explosion site by inductively coupled plasma mass spectrometry (ICP-MS) was developed. Samples were decomposed with mixed acids (hydrofluoric acid, aqua regia, nitric acid and perchloric acid). The detection limits for PGEs are 0.001～0.06 μg/L.The recoveries of standard additions are better than 85%. Nine sediment samples taken from Tunguska explosion site were determined by this method. And the anomalies of Ru, Rh, Pd, Ir and Pt were found.