影响PM_(2.5)自动监测准确度的主要因素

The Major Factor that Influences the Accuracy in PM_(2.5) Automatic Monitoring

PM2.5的自动监测过程较为复杂,其测量准确度受多种因素影响。通过分析几种典型PM2.5测定方法原理,研究了PM2.5监测过程中可能产生误差的来源,结果表明,影响PM2.5监测结果准确度的主要因素有采样流量的准确性、采样管加热方式、对PM2.5挥发性组分的补偿方式、校准膜本身的准确度和校准结果、监测仪器的日常运行维护水平等。因此,在PM2.5日常监测过程中,需加强对上述因素的误差控制,严格执行国家监测技术规范,确保PM2.5监测结果准确可靠。

PM2.5 monitoring technique is more complicated than other pollutants, the accuracy in monitoring is influenced by several factor,analyses the typical principle and the source of error in PM2.5 monitoring,the result shows that the major factors that influence the accuracy in PM2.5 monitoring include sampling flow rate accuracy , tube heating style, compensation for volatile component, calibration result based on standard foil, maintenance on monitoring instrument and so on, to assure the accuracy of PM2.5 monitoring data, must control the error in these major factors and step mentioned above, and strictly implement the statutory monitoring technical regulations in PM2.5 monitoring.