Comparison of real-time instruments used to monitor airborne particulate matter
Comparison of real-time instruments used to monitor airborne particulate matter
复制标题
DOI：
10.1080/10473289.2001.10464254
复制
发表时间：
2001-01-01
影响因子：
2.7
通讯作者：
Stroud, K
中科院分区：
文献类型：
--
作者：
Chung, A;Chang, DPY;Stroud, K
1998年12月2日至1999年1月31日，在加利福尼亚州贝克斯菲尔德，将使用五个实时连续空气颗粒物监测仪收集的测量结果与使用基于参考过滤器的采样器进行的测量进行了比较。这项分析的目的是评估每台仪器在圣华金河谷南部冬季条件下用于实时连续监测网络的适用性，该网络旨在测量空气动力学直径小于2.5微米(PM2.5)的空气中颗粒物的质量。使用贝塔衰减监测仪(BAM)、积分浊度计和连续气溶胶质量监测仪(CAMM)测量的空气颗粒物质量与使用基于过滤器的采样器进行的参考测量具有很好的相关性。在整个研究过程中，一台Dusttrak气溶胶采样器高估了空气中的颗粒物浓度，高估了大约3倍。用锥形元件振动微天平(TEOM)对空气中颗粒物的测量发现，比基于参考滤光片的测量结果低约等于空气中观察到的NH4NO3浓度的量。Dusttrak采样器和积分式浊度计的性能受空气中颗粒物的粒度分布的影响。在本研究中遇到的条件范围内，BAM、积分浊度计、CAMM、Dusttrak采样器和TEOM的性能不受温度、相对湿度、风速或风向的强烈影响。根据仪器性能，BAM、积分浊度计和CAMM似乎适合部署在加州中部的PM2.5实时连续监测网络中，用于研究期间遇到的冬季条件和气溶胶成分的范围。
Measurements collected using five real-time continuous airborne particle monitors were compared to measurements made using reference filter-based samplers at Bakersfield, CA, between December 2, 1998, and January 31, 1999. The purpose of this analysis was to evaluate the suitability of each instrument for use in a real-time continuous monitoring network designed to measure the mass of airborne particles with an aerodynamic diam less than 2.5 mum (PM2.5) under wintertime conditions in the southern San Joaquin Valley. Measurements of airborne particulate mass made with a beta attenuation monitor (BAM), an integrating nephelometer, and a continuous aerosol mass monitor (CAMM) were found to correlate well with reference measurements made with a filter-based sampler. A Dusttrak aerosol sampler overestimated airborne particle concentrations by a factor of similar to3 throughout the study. Measurements of airborne particulate matter made with a tapered element oscillating microbalance (TEOM) were found to be lower than the reference filter-based measurements by an amount approximately equal to the concentration of NH4NO3 observed to be present in the airborne particles. The performance of the Dusttrak sampler and the integrating nephelometer was affected by the size distribution of airborne particulate matter. The performance of the BAM, the integrating nephelometer, the CAMM, the Dusttrak sampler, and the TEOM was not strongly affected by temperature, relative humidity, wind speed, or wind direction within the range of conditions encountered in the current study. Based on instrument performance, the BAM, the integrating nephelometer, and the CAMM appear to be suitable candidates for deployment in a real-time continuous PM2.5 monitoring network in central California for the range of winter conditions and aerosol composition encountered during the study.