基于PID传感器的挥发性有机物监测研究  

Study on Monitoring Volatile Organic Compounds Based on PID Sensor

作　　者：王莉华 安欣欣 刘保献 景宽 李云婷 WANG Lihua;AN Xinxin;LIU Baoxian;JING Kuan;LI Yunting(Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology,Beijing Municipal Ecological and Environmental Monitoring Center,Beijing 100048,China)

机构地区：[1]北京市生态环境监测中心,大气颗粒物监测技术北京市重点实验室,北京100048

出　　处：《中国环境监测》2025年第1期142-151,共10页Environmental Monitoring in China

基　　金：国家重点研发计划(2017YFC0213003)。

摘　　要：挥发性有机物作为大气O_(3)与PM_(2.5)的共同前体物,是我国在近年来PM_(2.5)污染得到显著改善之后的下一个大气污染防治重点。对电离能为10.6 eV的光离子化(PID)传感器与设备进行挥发性有机物监测测试,结果表明:①PID传感器监测结果能较好地反映大气中挥发性有机物的浓度变化趋势,但其绝对量存在较大不确定性;②流量、湿度、O_(2)含量、校准情况、光窗清洁度均会对PID传感器监测结果的准确性产生显著影响,其中流量、湿度与O_(2)含量是在设备设计中需重点关注的因素,校准情况、光窗清洁度是在设备使用中需重点关注的因素;③在规范运维情景下,采样流量为600 mL/min时,配置高温高湿冷凝除湿、低温高湿加热除湿功能的传感器设备的状态一致性与数据准确性均优于扩散式设备,平均标准偏差从4.3×10^(-8)降至3.0×10^(-9)。As the common precursor of O_(3)and PM_(2.5),volatile organic compounds are the next focus of air pollution control in China after the significant improvement of PM_(2.5)pollution in recent years.In this study,PID sensors and equipment with ionization energy of 10.6 eV were tested.The results showed that:①The monitoring results of PID sensor can reflect the trend of volatile organic compounds concentration in the atmosphere well,but the absolute quantity has large uncertainty.②Flow rate,humidity,O_(2) content,calibration and light window cleanliness all have significant and complex influences on the accuracy of PID sensor monitoring results.Among them,flow rate,humidity and O_(2) content are the key objects in equipment design,while calibration and light window cleanliness are the key objects in equipment use.③Under standard operation and maintenance,the consistency and data accuracy of the sensor equipment with 600 mL/min sampling flow and high temperature and humidity condensation dehumidification and low temperature and humidity heating dehumidification are better than those of the diffused equipment,and the average standard deviation is reduced from 4.3×10^(-9) to 3.0×10^(-9).

关 键 词：PID传感器 挥发性有机物 影响因素 测试 

分 类 号：X830.2[环境科学与工程—环境工程] X87