Yao Maosheng, Mainelis Gediminas
Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901-8551, USA.
J Occup Environ Hyg. 2007 Jul;4(7):514-24. doi: 10.1080/15459620701407388.
Portable impactors are increasingly being used to estimate concentration of bioaerosols in residential and occupational environments; however, little data are available about their performance. This study investigated the overall performances of the SMA MicroPortable, BioCulture, Microflow, Microbiological Air Sampler (MAS-100), Millipore Air Tester, SAS Super 180, and RCS High Flow portable microbial samplers when collecting bacteria and fungi both indoors and outdoors. The performance of these samplers was compared with that of the BioStage impactor. The Button Aerosol Sampler equipped with gelatin filter was also included in the study. Results showed that the sampling environment can have a statistically significant effect on sampler performance, most likely due to the differences in airborne microorganism composition and/or their size distribution. Data analysis using analysis of variance showed that the relative performance of all samplers (except the RCS High Flow and MAS-100) was statistically different (lower) compared with the BioStage. The MAS-100 also had statistically higher performance compared with other portable samplers except the RCS High Flow. The Millipore Air Tester and the SMA had the lowest performances. The relative performance of the impactors was described using a multiple linear regression model (R(2) = 0.83); the effects of the samplers' cutoff sizes and jet-to-plate distances as predictor variables were statistically significant. The data presented in this study will help field professionals in selecting bioaerosol samplers. The developed empirical formula describing the overall performance of bioaerosol impactors can assist in sampler design.
便携式撞击式采样器越来越多地用于估计住宅和职业环境中的生物气溶胶浓度；然而，关于其性能的数据却很少。本研究调查了SMA微型便携式、生物培养、微流、微生物空气采样器（MAS-100）、密理博空气测试仪、SAS Super 180和RCS高流量便携式微生物采样器在室内和室外采集细菌和真菌时的整体性能。将这些采样器的性能与BioStage撞击式采样器的性能进行了比较。配备明胶滤膜的纽扣式气溶胶采样器也纳入了本研究。结果表明，采样环境对采样器性能可能有统计学上的显著影响，很可能是由于空气中微生物组成和/或其大小分布的差异。使用方差分析进行的数据分析表明，与BioStage相比，所有采样器（RCS高流量采样器和MAS-100除外）的相对性能在统计学上有差异（较低）。与除RCS高流量采样器外的其他便携式采样器相比，MAS-100在统计学上也具有更高的性能。密理博空气测试仪和SMA的性能最低。使用多元线性回归模型（R(2)=0.83）描述了撞击式采样器的相对性能；采样器的截留尺寸和喷嘴到平板距离作为预测变量的影响在统计学上具有显著性。本研究提供的数据将有助于现场专业人员选择生物气溶胶采样器。所建立的描述生物气溶胶撞击式采样器整体性能的经验公式可辅助采样器设计。
