Development and evaluation of an inhalable bioaerosol manifold sampler.
Development and evaluation of an inhalable bioaerosol manifold sampler.
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可吸入生物气溶胶歧管采样器的开发和评估。
DOI：
10.1080/15428119791012847
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Farthing,WE
中科院分区：
文献类型：
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作者：
Gao,P;Dillon,HK;Farthing,WE
本文介绍了一种可吸入生物气溶胶歧管采样器的开发和评价，用于连续采样期间重复样品的收集。在风速≤0.6 m/sec（≤~120 ft/min）和采样速度为0.6 m/sec的风洞实验中，对于粒径约为18 μ m的颗粒，采样效率在美国政府工业卫生学家会议的可吸入曲线的10%以内，对于粒径达26 μ m的颗粒，采样效率在18%以内。在风速≥0.6 m/sec时，0.8 m/sec的采样速度产生的效率在可吸入曲线的15%以内（直径约为22 μm），在20%以内（直径约为25 μm）。在风洞中雾化并用歧管采样器收集的15.6 μm和25.6 μm单分散聚苯乙烯珠粒的显微计数得到精确浓度（合并CV分别为9.0和5.3%），平均值分别为APS 3310型空气动力学粒度仪测量值的115%和92%。在棉尘环境中的现场试验证明了产生真菌孢子的时间/浓度曲线的能力，其类似于用水平淘析器确定的棉尘水平所指示的。棉尘采样效率高，而棉纤维被排除在外。在奶牛场进行的现场试验表明，使用歧管采样器测定的孢子浓度与通过中心测试端口测定的浓度之间无统计学显著偏倚（p=0.72）。
This paper describes the development and evaluation of an inhalable bioaerosol manifold sampler for the collection of replicate samples over sequential sampling periods. Wind tunnel experiments at wind velocities ≤0.6 m/sec (≤~120 ft/min) and at a sampling velocity of 0.6 m/sec yielded sampling efficiencies within 10% of the American Conference of Governmental Industrial Hygienists' inhalable curve up to particle diameters of about 18 urn and efficiencies within 18% for diameters up to 26 urn. At wind velocities ≥0.6 m/sec, a sampling velocity of 0.8 m/sec yielded efficiencies that were within 15% of the inhalable curve up to diameters of about 22 μm and within 20% for diameters up to 25 μm. Microscopic counts of 15.6-μm and 25.6-μm monodisperse polystyrene beads aerosolized in the wind tunnel and collected with the manifold sampler yielded precise concentrations (pooled CV=9.0 and 5.3%, respectively) averaging 115% and 92%, respectively, of measurements with the APS Model 3310 aerodynamic particle sizer. Field tests in a cotton dust environment demonstrated the ability to generate a time/concentration profile of fungal spores similar to that indicated for cotton dust levels determined with horizontal elutriators. Cotton dust was sampled efficiently while cotton fibers were excluded. Field tests on a dairy farm indicated no statistically significant bias (p=0.72) between spore concentrations determined with the manifold sampler and concentrations determined through a central test port.