Yan Beizhan, Pitiranggon Masha, Ross James, Arthen-Engeland Thomas, Stelter Andreas, Chillrud Steven N
Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA.
Bruker Daltonik GmbH, Bremen, Germany.
J Anal Bioanal Tech. 2018;9(2). doi: 10.4172/2155-9872.1000403. Epub 2018 Apr 11.
This study validates the analysis of polycyclic aromatic hydrocarbons (PAHs) in microgram levels of particulate matter (PM) collected on filters by two low-flow rate, real-time monitors, microPEM™ and microAeth. Particle-associated PAHs were analyzed by a coupling of a gas chromatograph to a sensitive, atmospheric-pressure laser ionization-mass spectrometer. Air particulate samples were collected over the course of one or two days in the living room of a fourth-floor apartment in New York City. Three types of samplers, the two aforementioned personal samplers and a high-flow rate pump (4 liters per minute), were operated side by side, and three samples of each type were collected during each sampling period. Intrasampler agreement as measured by relative standard deviation (RSD) was within 1% to 18%. After background subtraction, total PAH measured by all three sampler types had good agreement (R=0.99). This ability to accurately characterize personal PAH exposure in archived filters collected by these real-time samplers could provide additional important PAH exposure information that can benefit many environmental health studies using these monitors.
本研究验证了通过两台低流量实时监测仪microPEM™和microAeth对滤膜上收集的微克级颗粒物（PM）中的多环芳烃（PAH）进行分析的方法。通过气相色谱仪与灵敏的大气压激光电离质谱仪联用对与颗粒物相关的多环芳烃进行分析。在纽约市一套四楼公寓的客厅里，在一天或两天的时间内采集空气颗粒物样本。三种采样器，即上述两种个人采样器和一台高流量泵（每分钟4升）并排运行，在每个采样期间每种类型采集三个样本。通过相对标准偏差（RSD）衡量的采样器内一致性在1%至18%之间。背景扣除后，所有三种采样器类型测得的总多环芳烃具有良好的一致性（R = 0.99）。这些实时采样器在存档滤膜中准确表征个人多环芳烃暴露的能力，可以提供额外的重要多环芳烃暴露信息，这将有利于许多使用这些监测仪的环境卫生研究。
