波长色散X荧光光谱法检测室内PM_(2.5)无机元素组份  

Elemental Composition Analysis for Indoor PM_(2.5) via Wavelength Dispersive X-ray Fluorescence

作　　者：刘合凡[1] 葛良全[1] 任茂强[1] 李丹[1] 罗耀耀[1] 赵剑坤[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《核电子学与探测技术》2015年第6期538-542,共5页Nuclear Electronics & Detection Technology

基　　金：国家863计划(2012AA061803);四川科技计划(2015RZ0010);四川教育计划(15ZB0075)资助

摘　　要：介绍用波长色散X荧光光谱法(WDXRF)对室内PM2.5样品进行无机元素检测的测试方法。该方法以在同一房间每天只采集一个PM2.5样品的方式,利用自行搭建的大气颗粒物采集平台,将PM2.5样品收集在滤膜上,运用WDXRF检测滤膜试样中的无机元素。结果表明:(1)室内PM2.5样品的无机元素成份复杂,主要存在Na、Mg、Al、Si、S、Cl、K、Ca、Ti、Fe、Zn等元素,以及极少量的As、Rb、Sr、Zr、Sb、Ta、Pb等元素;(2)对Fe、Ni、Cu、Zn、As、Pb等15种无机元素的定量分析结果表明,室内PM2.5中Ca元素的含量最高,平均浓度达3.381μg/m3;其次是K、Zn、Fe,平均浓度分别为1.316、1.114、0.517μg/m3;Ti、Mn、Cu、As、Pb等无机元素平均浓度均在0.500μg/m3以下。确定室内PM2.5中无机元素组份,可为室内PM2.5的污染物溯源和污染防治措施提供科学依据。A method for detection of indoor PM2. 5samples by wavelength dispersive X ray fluorescence spectrometry is introduced in this paper. And elemental compositions are analyzed in indoor PM2. 5. The daily PM2. 5samples with different air＇s volumes,which were collected by a self-built Airborne Particulate Matter Collected Platform,are carried out in the same room. The results show that：（ 1） the ingredients of indoor PM2. 5samples are very complex,the elements Na,Mg,Al,Si,S,Cl,K,Ca,Ti,Fe and Zn are the main ingredients,as well as a very small amount of elements As,Rb,Sr,Zr,Sb,Ta,Pb and others;（ 2） The results of quantitative analysis of 15 kinds of inorganic elements Fe,Ni,Cu,Zn,As,Pb showed that Ca element within the PM2. 5content was the highest,which average concentration is 3. 381 μg / m3; followed by K,Zn,Fe,the average concentrations are 1. 316,1. 114 and 0. 517 μg / m3respectively; In addition,concentrations of Ti,Mn,Cu,As,Pb and others are below 0. 500 μg / m3. The method for detection of indoor PM2. 5 samples can provide a scientific basis for the development of appropriate pollution prevention measures.

关 键 词：室内 PM2.5 WDXRF X51 X831 

分 类 号：O348.6[理学—固体力学]