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

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/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.

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

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).