Abstract：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.
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2022, Vol. 43 
