气旋式生物气溶胶采样器采集物理效率评价方法研究

为了评价气旋式生物气溶胶采样器的采集效率，搭建了颗粒物浓度均匀、稳定的静态箱法评价装置，对国内2款气旋式生物气溶胶采样器的采集物理效率进行了测量，最终拟合得到采集效率曲线。测量结果表明：在品牌一采样器的固定采样流量下，其采集物理效率曲线的D_a50(采集效率为50%时的空气动力学直径)为0.91μm;品牌二采样器具有5种可调的采样流量，在不同流量下D_a50分别为1.60μm、1.36μm、1.19μm、1.06μm和1.05μm。对比了使用初始容量分别为15 mL和7.5 mL的采样液得到的品牌二采样器的采集物理效率，发现采样液初始容量较少时，采集物理效率偏低。为气旋式生物气溶胶采样器性能的评价方法提供了参考。

Study on Evaluation Method of Physical Efficiency of Cyclone Microbiological Sampler

In order to evaluate the collection efficiency of cyclonic microbiological sampler, a static chamber method evaluation device with uniform and stable particle concentration was built to measure the collection physical efficiency of two cyclonic microbiological samplers in China, and the collection efficiency curve was fitted. The measurement results showed that under the fixed sampling flow of Brand 1 sampler, Da50(the aerodynamic diameter when the collection efficiency was 50%) of the physical acquisition efficiency curve was 0.91μm. The Brand 2 sampler had 5 kinds of adjustable sampling flow rates, and Da50 were 1.60μm, 1.36μm, 1.19μm, 1.06μm and 1.05μm, respectively. The acquisition physical efficiency of Brand 2 sampler was compared with that of sample solution with initial capacity of 15mL and 7.5mL, respectively. It was found that the acquisition physical efficiency was lower when the initial capacity of sample solution was lower. The study provided a reference for the performance evaluation of cyclonic microbiological sampler.