环境空气气相过氧化氢在线分析仪的研发与应用  

Development and application of online ambient air gas-phase hydrogen peroxide analyzer

作　　者：朱姝 曾凌寒 杜玥萱 李世超 吴娟 曾立民[1,4] ZHU Shu;ZENG Linghan;DU Yuexuan;LI Shichao;WU Juan;ZENG Limin(State Key Joint Laboratory of Environment Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871;Jiangsu Expressway Engineering Maintenance Technology Co.,Ltd.,Nanjing 211106;Beijing SDL Technology Co.,Ltd.,Beijing 102206;Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044)

机构地区：[1]北京大学环境科学与工程学院,环境模拟与污染控制国家重点联合实验室,北京100871 [2]江苏高速公路工程养护技术有限公司,南京211106 [3]北京雪迪龙科技股份有限公司,北京102206 [4]江苏省大气环境与装备技术协同创新中心(南京信息工程大学),南京210044

出　　处：《环境科学学报》2024年第12期338-349,共12页Acta Scientiae Circumstantiae

基　　金：国家重点研发计划(No.2023YFC3705300)。

摘　　要：本研究基于酶促荧光法设计了一套环境空气气相过氧化氢(H_(2)O_(2))在线分析仪,优化了各项仪器参数,实现了对大气H_(2)O_(2)浓度的在线可靠测定,并可长期稳定运行.仪器检出限为40×10^(-12)(V/V,下同),噪声低于满量程的1%,延迟时间为7 min,时间分辨率为5 min,在40×10^(-12)~14.1×10^(-9)的气相H_(2)O_(2)测定范围内,仪器标准曲线R^(2)=0.9999.在北京大学春季3月份观测期间,测定气相H_(2)O_(2)浓度均值为0.16×10^(-9),清洁天中呈下午高、凌晨低的日变化趋势,与O_(3)、j(H_(2)O_(2))基本呈正相关变化,峰值略晚于O_(3)和j(H_(2)O_(2))出现;轻度污染过程中,H_(2)O_(2)与PM_(2.5)呈基本同步的变化趋势.In this study,an online gas-phase hydrogen peroxide(H_(2)O_(2))analyzer in the ambient air was developed based on enzymatic fluorescence method with instrument parameters optimized.Accurate and stable online measurement of atmospheric H_(2)O_(2) concentration was achieved.The detection limit of the instrument was 40×10^(-12)(V/V),with full scale noise<1%,delay time of 7 minutes and time resolution of 5 minutes.H_(2)O_(2) could be detected with good linearity(R^(2)=0.9999)within the mixing ratio range of 40×10^(-12)(V/V)~14.1×10^(-9)(V/V).During the observation period at Peking University in March,an average H_(2)O_(2) mixing ratio of 0.16×10^(-9)(V/V)was measured by the developed instrument.During clean days,clear diurnal variation of H_(2)O_(2)was observed and positive correlations with O_(3) and j(H_(2)O_(2))were obtained,with the peak appearing slightly later than those of O_(3) and j(H_(2)O_(2))in the afternoon.In a pollution event,H_(2)O_(2) showed a basic synchronous trend with PM_(2.5).

关 键 词：过氧化氢 环境空气 在线监测 光化学反应 仪器研发 

分 类 号：X851[环境科学与工程—环境工程]