南京市环境空气挥发性有机物监测方法比对研究

2018年9月20—29日,开展了南京市环境空气非甲烷烃(PAMS)原清单中57种挥发性有机物的手工和在线比对监测,监测项目主要包括碳氢化合物、卤代烃和含氧挥发性有机物。通过对VOCs 3 h均值、日均值和主要污染物指标等进行比对,分析在线监测数据与手工监测数据的相关性。测试结果表明,两种方法得到的3 h均值的差异度(1.43)和相关系数(0.897),日均值的差异度(2.16)和相关系数(0.946),呈现出差异度不显著、高度线性相关的特征。同时,进一步分析了监测数据产生偏离的原因,建议加强环境空气手工监测的质控管理,强化在线监测设备的运维管理,推进环境空气挥发性有机物监测的合理、有序发展。

Comparison on Monitoring Methods of Environmental Air Volatile Organic Compounds in Nanjing

From September 20 to 29,2018,57 volatile organic compounds in the original PAMS inventory for Nanjing ambient air were monitored by manual monitoring and online monitoring.The monitoring project mainly included hydrocarbons,halogenated hydrocarbons and oxygenated volatile organic compounds.Using the basic data of 3-hour mean,daily mean and main pollutant index,the correlation between the two monitoring methods were analyzed.The results showed that the difference degree and correlation coefficient of 3-hour mean of the two methods was 1.43 and 0.897,respectively;the difference degree and correlation coefficient of daily mean of the two methods was 2.16 and 0.946,respectively,showed that the difference degree was not significant and highly linear related characteristics.At the same time,the deviation of monitoring data was further analyzed,and it was proposed to strengthen the quality control management of manual monitoring of ambient air,strengthen the operation and maintenance management of online monitoring equipment,and promote the reasonable and orderly development of ambient air volatile organic compounds monitoring.