基于气液相化学发光技术的臭氧在线检测方法  

Online Ozone Detection Method Based on Gas-Liquid Phase Chemiluminescence Technology

作　　者：李佳祁 付大友 王竹青 谭文渊 陈雨琴 冀钢扬 LI Jiaqi;FU Dayou;WANG Zhuqing;TAN Wenyuan;CHEN Yuqin;JI Gangyang(Sichuan University of Science and Engineering,College of Chemical Engineering,Zigong,Sichuan 643000,China;Beijing Kechuang Haiguang Instrument Co.,Ltd.,Beijing 100020,China)

机构地区：[1]四川轻化工大学化学工程学院,四川自贡643000 [2]北京科创海光仪器有限公司,北京100020

出　　处：《应用化学》2020年第1期96-102,共7页Chinese Journal of Applied Chemistry

基　　金：四川理工学院研究生创新基金项目(y2018057);四川理工学院人才引进项目(2016RCL17);四川理工学院研究生创新基金项目(y2018058);四川省自贡市科技局项目(2018YYJC12);精细化工助剂及表面活性剂四川省高等学校重点实验室项目(2018JXY06);自贡市科技局项目(2017xc20)资助~~

摘　　要：基于鲁米诺(luminol)化学发光体系,采用自主研发的在线臭氧浓度检测仪,建立了一种实时在线检测臭氧浓度的方法,用于分析测定痕量浓度水平的臭氧气体。考察了鲁米诺、氢氧化钾、部分醇类化合物和表面活性剂等因素对化学发光强度的影响。结果表明,在鲁米诺(0.005 mol/L)、氢氧化钾(0.05 mol/L)体系中加入乙二醇(体积分数1.5%)、甲醇(体积分数1.5%)、乙醇(体积分数1.0%)、丙三醇(体积分数3.0%)能显著增强鲁米诺体系检测O3的化学发光信号,而甲醛溶液(体积分数3.0%)能有效抑制NO 2信号的干扰。同时,测得检测臭氧的检出限为1.26μg/m^3、相对标准偏差为0.32%,相对误差为0.75%。利用该体系测定臭氧,具有信号稳定、精密度好、准确度高、检出限低等优点,适用于大气中微量O3的在线连续检测。Based on luminol chemiluminescence system,a self-developed online ozone concentration detector was used to establish a real-time online method for detecting ozone concentration for the determination of ozone gas at trace level.The effects of luminol,potassium hydroxide,alcohols and surfactants on the chemiluminescence intensity were investigated.The results showed that ethylene glycol(volume fraction 1.5%),methanol(volume fraction 1.5%),ethanol(volume fraction 1.0%),and glycerol(volume fraction 3.0%)were added to luminol(0.005 mol/L)and potassium hydroxide(0.05 mol/L)can significantly enhance the luminescence signal of O 3 in the luminol system,and formaldehyde(volume fraction 3.0%)can effectively inhibit the interference of NO 2 signal.At the same time,the detection limit of ozone was 1.26μg/m 3,the relative standard deviation was 0.32%,and the relative error was 0.75%.This ozone determination system has the advantages of stable signal,good precision,high accuracy and low detection limit.It is suitable for online continuous detection of trace O 3 in the atmosphere.

关 键 词：鲁米诺 气液相 化学发光 检测 臭氧 

分 类 号：O659[理学—分析化学]