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

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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 (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 PM₁₀ and PM_2.5 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).

Key words： PM₁₀ PM_2.5 reference method beta attenuation method linearity uncertainty

Received: 23 May 2022

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X513

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	Articles by authors
	WU Juan
	XU Ke-xin
	CHI Ying
	ZHOU Gang
	WANG Wei

Cite this article:

WU Juan,XU Ke-xin,CHI Ying等. Evaluation of the linear relationship validity between two beta attenuation monitors with different configurations[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(12): 5617-5625.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I12/5617

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