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两种不同构型b射线颗粒物分析仪线性关系的有效性评价
引用本文:吴娟,徐可欣,迟颖,周刚,王玮. 两种不同构型b射线颗粒物分析仪线性关系的有效性评价[J]. 中国环境科学, 2022, 42(12): 5617-5625
作者姓名:吴娟  徐可欣  迟颖  周刚  王玮
作者单位: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
基金项目: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PM10和细颗粒物PM2.5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/m3)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PM10和PM2.5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.

关 键 词:PM10  PM2.5  参比方法  β射线衰减法  线性度  不确定度  
收稿时间:2022-05-23

Evaluation of the linear relationship validity between two beta attenuation monitors with different configurations
WU Juan,XU Ke-xin,CHI Ying,ZHOU Gang,WANG Wei. Evaluation of the linear relationship validity between two beta attenuation monitors with different configurations[J]. China Environmental Science, 2022, 42(12): 5617-5625
Authors:WU Juan  XU Ke-xin  CHI Ying  ZHOU Gang  WANG Wei
Affiliation:1. School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China;2. Beijing SDL Technology Co, Ltd. Beijing 102200, China;3. Environmental Monitoring Instrument Quality Supervision Test Lab, China Nationl Environmental Monitoring Centre, Beijing 100012, China
Abstract: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 (PM10) and fine particles (PM2.5), 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 PM10 and PM2.5 meet the requirements of EPA-CFR-40-part53, even in case of relatively large concentration range (0~250μg/m3) and adequate data sets (n>100).
Keywords:PM10  PM2.5  reference method  beta attenuation method  linearity  uncertainty  
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