岩矿测试2016，Vol.35Issue(3)：259-264,6.DOI:10.15898/j.cnki.11-2131/td.2016.03.007
微波消解－双浊点萃取 ICP －MS 测定地球化学样品中的痕量铂钯钌铑
Determination of Pt,Pd,Ru,Rh in Geochemical Samples by ICP-MS with Microwave Digestion and Dual-cloud Point Extraction
摘要
Abstract
Traditional cloud point extraction methods commonly enrich elements in the viscous surfactant. However,the viscosity of the solution will adversely affect the detection signal of the plasma.Harmful agents such as methanol are usually adopted as a thinner to reduce the viscosity of the organic phase,but the organic component affects the stability of the plasma,and organic absorption on the injection tube will enhance elemental memory effect.These disadvantages limit the widespread application of Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)in cloud point extraction.A method to determine Pt,Pd,Ru, Rh in geochemical samples by ICP-MS based dual-cloud point extraction has been established,and is reported in this paper.After the microwave digestion procedure,first cloud point extraction is performed on the sample solution using DDTP as the sequestrant and Triton X-114 as the surfactant.HNO3 is added into the organic phase,and second cloud point extraction is performed by heating so that Pt,Pd,Ru,Rh enter the water phase from the organic phase. Enrichment factors are 45,33,18,35,and detection limits are 0.05,0.02,0.10 and 0.03 μg/L for Pt,Pd,Ru and Rh,respectively.The proposed method succeeds in the simultaneous enrichment of trace platinum group elements in complex matrix geochemical samples,improving the stability of the ICP-MS measurement.关键词
地球化学样品/铂族元素/双浊点萃取/有机相/水相/电感耦合等离子体质谱法Key words
geochemical samples/platinum group elements/dual-cloud point extraction/organic phase/aqueous phase/Inductively Coupled Plasma-Mass Spectrometry分类
化学化工引用本文复制引用
沈宇,张尼,高小红,李展,李日升,郑建斌..微波消解－双浊点萃取 ICP －MS 测定地球化学样品中的痕量铂钯钌铑[J].岩矿测试,2016,35(3):259-264,6.基金项目
陕西省科技计划项目（2015KJXX-81）；陕西省工业科技攻关项目 （）
