介质阻挡放电-发射光谱测定硫醚恶臭组分  

A New Method for the Determination of Sulfide Malodorous Component by Dielectric Barrier Discharge-Optical Emission Spectroscopy

作　　者：熊思 吴得福 王强 王永红 赵春艳 李金花[2] 周保学[2] XIONG Si;WU Defu;WANG Qiang;WANG Yonghong;ZHAO Chunyan;LI Jinhua;ZHOU Baoxue(Qingdao Jiaming Measurement and Control Technology Co.,Ltd.,Qingdao 266000,China;School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]青岛佳明测控科技股份有限公司,山东青岛266000 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《环境科学与技术》2021年第12期77-80,共4页Environmental Science & Technology

基　　金：国家重大科学仪器设备开发专项(2018YFF01011702)。

摘　　要：该文基于气相色谱分离、低温等离子放电与发射光谱技术,建立了同时测定甲硫醚、二甲二硫醚、二乙基二硫醚恶臭组分的新方法。以介质阻挡放电(DBD)低温等离子体作为硫醚恶臭组分的发射光谱(OES)激发源,将低温冷阱热解吸进行浓缩与热解吸前处理,采用DBD-OES微型发射光谱系统产生的384.94 nm特征光谱为检测信号,经电荷耦合检测器(CCD)采集信号;方法检出限(S/N=3),甲硫醚0.49μg/m^(3),二甲二硫醚0.50μg/m^(3),二乙基二硫醚1.45μg/m^(3);精密度(重复性实验n=9),甲硫醚2.7%(2.5μg/m^(3)),二甲二硫醚2.6%(2μg/m^(3)),二乙基二硫醚8.7%(10μg/m^(3));环境大气加标回收率82.0%~90.8%。该方法灵敏快速,简便易行,可应用于痕量硫醚恶臭组分的实验室和应急监测。The determination method of sulfide malodorous component was established based on gas chromatographic separation,low-temperature plasma discharge and emission spectroscopy technology.The low-temperature plasma of dielectric barrier discharge(DBD)was used as the excitation source for the optical emission spectroscopy(OES)of sulfoether.The cold-trap thermal desorption was used as the pretreatment method for concentration and thermal desorption.The characteristic spectrum of 384.94 nm generated by the DBD-OES is used as the detection signal,and the signal was collected by charge coupled detector(CCD).The detection limit of the method(S/N=3)is 0.49μg/m^(3),0.50μg/m^(3),1.45μg/m^(3)for methyl sulfide,dimethyl disulfide and diethyl disulfide respectively.The precision(repeatability test n=9)is 2.7%for methyl sulfide as the concentration of 2.5μg/m^(3),2.6%for dimethyl sulfide as the concentration of 2μg/m^(3),8.7%for diethyl sulfide as the concentration of 10μg/m^(3).The standard recovery rate of environmental water samples is about 82.0%~90.8%.The method is sensitive,rapid,simple and easy to implement,and can be applied to trace monitoring of sulfide malodorous component for emergency and laboratory analysis.

关 键 词：硫醚 恶臭 介质阻挡放电 发射光谱 测定 

分 类 号：X830.2[环境科学与工程—环境工程]