电感耦合等离子体质谱法测定大气PM2.5中的12种元素  

Determination of 12 elements in atmospheric PM2.5 by inductively coupled plasma mass spectrometry

作　　者：洪月玲[1] 钱云霞[1] 齐斌 HONG Yue -ling;QIAN Yun -xia;QI Bin(Physicochemical Laboratory,ZhengZhou Center for Disease Contral and Prevention,Zhengzhou,Henan 450000,China)

机构地区：[1]郑州市疾病预防控制中心理化检验所,河南郑州450007

出　　处：《中国卫生检验杂志》2019年第2期160-162,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的应用电感耦合等离子体质谱法(ICP-MS)测定大气颗粒物(PM2. 5)中锑(Sb)、铝(Al)、砷(As)、铍(Be)、镉(Cd)、铬(Cr)、汞(Hg)、铅(Pb)、锰(Mn)、镍(Ni)、硒(Se)、铊(Tl)等12种元素,建立一种快速、简便、同时测定大气颗粒物中多种元素的方法。方法采用石英滤膜采集空气细颗粒物样品,经5%硝酸水浴超声(70℃)提取3 h后,用ICP-MS法测定各元素含量,得到标准曲线,并对方法的检出限、精密度及回收率进行测定分析各元素含量。结果 12种元素在线性范围内的相关系数均> 0. 999,元素检出限为0. 02 ng/m3～0. 5 ng/m3;相对标准偏差(RSD)均低于3. 66%;低、中、高3种浓度的加标回收率均在87. 25%～112. 2%。结论稀硝酸消解-超声辅助提取样品的前处理方式简便,ICP-MS法快速、准确、检出限低、动态范围宽,适合PM2. 5中多种元素的同时检测。Objective To establish a fast and simple method for the simultaneous determination of Sb,Al,As,Be,Cd,Cr, Hg,Pb,Mn,Ni,Se and Tl in atmospheric particulates matter(PM2.5)using inductively coupled plasma-mass spectrometry (ICP-MS.).Methods The fine particulate matters in air were collected using quartz membrane,and then put in an ultrasonic bath(70℃)for extraction with 5% nitric acid.The concentrations of these elements were determined using ICP-MS.The standard curve was established,and the detection limit,precision and recovery of the method were determined and analyzed. Results The correlation coefficient of 12 elements in the linear range were above 0.999,the detection limit was within 0.02ng/m^3-0.5ng/m^3;the relative standard deviation (RSD)was less than 3.66%;the recovery rates of the three concentrations were within 87.25%-112.2%.Conclusion The pretreatment method for ultrasonic extraction with dilute nitric acid is simple ;ICP-MS is fast,accurate with low detection limit and wide dynamic range,which is suitable for the simultaneous detection of multiple elements,in PM2.5.

关 键 词：电感耦合等离子体质谱法 大气颗粒物 元素 

分 类 号：X513[环境科学与工程—环境工程]