两种不同构型β射线颗粒物分析仪线性关系的有效性评价  

Evaluation of the linear relationship validity between two beta attenuation monitors with different configurations

作　　者：吴娟 徐可欣[1] 迟颖[3] 周刚[3] 王玮 WU Juan;XU Ke-xin;CHI Ying;ZHOU Gang;WANG Wei(School of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China;Beijing SDL Technology Co,Ltd.Beijing 102200,China;Environmental Monitoring Instrument Quality Supervision Test Lab,China Nationl Environmental Monitoring Centre,Beijing 100012,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]北京雪迪龙科技股份有限公司,北京102200 [3]中国环境监测总站仪器质检室,北京100020

出　　处：《中国环境科学》2022年第12期5617-5625,共9页China Environmental Science

基　　金：国家重点研发计划(2018YFC0214100)。

摘　　要：为评价导流锥式同时采样-测量β射线颗粒物分析仪的测量准确度,以分步采样-测量β射线颗粒物分析仪采样分析作为参比方法,使用2类构型的仪器对环境空气中可吸入颗粒物PM_(10)和细颗粒物PM_(2.5)进行长期平行比对监测.本文依据EN 16450标准对比对数据线性关系进行有效性评价,建立了修正的线性方程,导出了方法间不确定度评价式,结果表明导流锥式同时采样-测量结构和分步采样-测量结构的β射线颗粒物分析仪之间存在有效的线性关系.通过仪器内置修正参数浓度斜率、浓度截距修正后,在较宽浓度跨度范围(0~250μg/m^(3))内和足够多的比对数据(n>100)条件下,两种不同结构的仪器监测PM_(10)和PM_(2.5)的比对斜率、截距和相关系数(参比方法作为X轴)均能满足EPA CFR 40part53的要求.In order to evaluate the accuracy of BAM(Beta Attenuation Monitor)with simultaneous cone-sampler,two types of configuration instruments are compared with the long-term ambient air monitoring of inhalable particles(PM_(10))and fine particles(PM_(2.5)),by using the BAM with step-by-step sampler as the reference method.According to EN 16450,this work evaluates the validity of the linear relationship of the data,establishes a modified linear equation,and derives the uncertainty evaluation formula between methods.The results demonstrate the effective linear relationship between the measuring results of BAM simultaneous cone-sampler and step-by-step sampler.After the concentration slope and concentration intercept are corrected by the built-in correction parameters,the slope,intercept and correlation coefficient(between reference method)of PM_(10) and PM_(2.5) meet the requirements of EPA-CFR-40-part53,even in case of relatively large concentration range(0~250μg/m^(3))and adequate data sets(n>100).

关 键 词：PM_(10) PM_(2.5) 参比方法 β射线衰减法 线性度 不确定度 

分 类 号：X513[环境科学与工程—环境工程]