付爱瑞 1陈庆芝 1罗治定 1姜云军 1金倩 1王芸1
作者信息
- 1. 河北省地矿中心实验室,河北,保定,071051
- 折叠
摘要
Abstract
In atmospheric particles ( TSP and PM10 ), the high contents of some inorganic elements including Si, Al, Ca, Mg, K, Fe and Na are the proxy elements for the particles source analysis. At present, there are several methods to analyze inorganic elements for atmospheric particles such as neutron activation analysis, X-ray Fluorescence Spectrometry ( XRF ), Inductively Coupled Plasma-Atomic Emission Spectrometry ( ICP-AES ) and Inductively Coupled Plasma-Mass Spectrometry ( ICP-MS ) after dissolving by microwave ( or high-pressured cauldron ). The established method for determining Si, Al, Ca, Mg, Fe, Ti, Sr, Ba and Zr in aerosols by ICP-AES with alkali melting solved the problems of incomplete dissolving for Si caught in an atmospheric particles filter diaphragm, and improved the precision and accuracy of the determinations of major and trace elements such as Ti, Ba, Sr, Zr. In the paper, the formula of flux is also discussed, the temperature and time for ashing, acidity, and interference effect. This method was developed by ashing the samples at a temperature of 530 -550℃ for 60 min in a nickel crucible with sodium hydroxide, extracted by hot water, acidificated by 2 mL HC1 ( 50% ), eliminated interference by sodium-matrix-matching and measured by ICP-AES. The results were in good agreement with certified values with an accuracy of RE <4% , precision of <5% and detection limits of 0.0047 -1.2 ng/g under the selected experimental conditions. This method is inexpensive, rapid, convenient and suitable for a large number of bulk samples with high accuracy and precision.关键词
大气颗粒物/无机元素/碱熔/电感耦合等离子体发射光谱法Key words
aerosol/ inorganic elements/ alkali melting/ inductively coupled plasma-atomic emission spectrometry
