碱熔-电感耦合等离子体发射光谱法测定大气颗粒物中的硅  

Determination of silicon in atmospheric particulate matter by alkali fusioninductively coupled plasma atomic emission spectrometry

作　　者：战锡林 葛璇 陈燕朋 刘一飞 孙晓艳 ZHAN Xilin;GE Xuan;CHEN Yanpeng;LIU Yifei;SUN Xiaoyan(Jinan Ecology and Environment Monitoring Center of Shandong Province,Jinan 250100)

机构地区：[1]山东省济南生态环境监测中心,济南250100

出　　处：《分析试验室》2021年第6期731-735,共5页Chinese Journal of Analysis Laboratory

基　　金：泉城产业领军人才支持计划"城市大气复合污染成因与防治关键技术研究"项目资助。

摘　　要：建立了NaOH碱熔-电感耦合等离子体发射光谱法测定大气颗粒物中硅含量的方法。采用聚丙烯膜采集大气颗粒物,以NaOH为熔融剂,用HCl溶液进行酸化,并用电感耦合等离子体发射光谱在最佳波长251.611 nm下测定硅含量。结果表明,当采样体积为150 m^(3)(标准状态)时,大气颗粒物中硅元素的检出限为33 ng/m^(3),相对标准偏差小于2%,加标回收率在89.7%~103.3%之间。土壤标样与特氟龙膜、聚丙烯膜模拟实际样品对比检测结果显示,特氟龙滤膜灰化造成硅损失,聚丙烯膜更适用于碱融法消解大气颗粒物样品时硅的测定。该方法适用于大批量大气颗粒物中硅的准确测定。A method for the determination of silicon in atmospheric particulate matter by sodium hydroxide alkali fusion-inductively coupled plasma atomic emission spectrometry was established.In this approach,atmospheric particles were collected by polypropylene membrane,acidified by hydrochloric acid solution with sodium hydroxide as melting agent,and determined by ICP-AES at the optimum wavelength of 251.611 nm.The analysis showed that under the optimal conditions,the sampling volume was 150 m^(3)(standard state),the detection limit of silicon in atmospheric particles was 33 ng/m^(3),the relative standard deviation was less than2%,and the recoveries were between 89.7%and 103.3%.Moreover,the results of comparison tests between soil standard samples and simulated actual samples with Teflon and polypropylene filter membrane showed that the ash of Teflon filter membrane caused the loss of silicon element,so polypropylene filter membrane was more suitable for the determination of silicon in atmospheric particulate matter samples digested by alkali melting method.This method is suitable for the accurate determination of silicon in large quantities of atmospheric particulate matter.

关 键 词：碱熔 电感耦合等离子发射光谱法 大气颗粒物 硅 

分 类 号：X831[环境科学与工程—环境工程]