滤膜对PM_(2.5)采样和组分分析准确性的影响  

Impacts of sampling filters on PM_(2.5) concentration and composition analysis accuracy

作　　者：唐军婷 宋党育[1] 姬莞莞 

机构地区：[1]河南理工大学资源环境学院,焦作454000

出　　处：《环境工程学报》2016年第10期5815-5820,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(41272173)

摘　　要：以大流量采样器采样为例,通过多个采样器应用不同滤膜多周期现场采样、滤膜的孔隙结构与组成分析以及不同采样介质背景下PM_(2.5)组成分析,研究了不同滤膜对PM_(2.5)浓度测定和组分分析的影响。结果表明:聚四氟乙烯(PTFE)滤膜和玻璃纤维滤膜、石英滤膜对于PM_(2.5)浓度值的测定一致性很好,但PTFE滤膜的测定含量较玻璃纤维滤膜和石英滤膜略低;其原因与滤膜的微观结构和颗粒物在滤膜上的聚集状态有关;空白滤膜的背景值差异影响PM_(2.5)中化学组分浓度的测定。Based on multitemporal PM2.5sampling with three types of filters in two high-volume air samplers,the effect of the filters on the PM2.5concentration and composition was analyzed by pore microstructure observation of the filter and composition determination of the filter and PM2.5with SEM,ICP-MS,XRF,and IC. The results showed that the PM2.5concentrations determined with the PTFE,glass fiber,and quartz filters were consistent with each other,but the concentration measured by the PTFE filter was slightly lower than it was when measured by the other filters. The reason for this may be associated with the microstructure of the filters and aggregation state of the particles on different filters. The component discrepancy in the backgrounds of different blank filters interfered with the determination of the chemical components of PM2.5.

关 键 词：PM2.5 重量法采样 滤膜微观结构 组成分析 

分 类 号：X831[环境科学与工程—环境工程]