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| Effect of Sampling Flow Rate and Nozzle-plate Spacing on Collection Efficiency of Plankton Sampler |
| TIAN Ying,ZHANG Guo-cheng,LIU Jia-qi,WU Dan,SHEN Shang-yi,JING Wen-jie |
| National Quality Supervision and Inspection Center for Eco-environmental Products, Beijing Institute of Metrology, Beijing 100029, China |
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Abstract As an efficient single-stage Anderson impact sampler, the plankton sampler is easy to operate, small and portable, which is widely used in clean rooms of pharmaceutical factories, sanitation and epidemic prevention. At present, the collection efficiency of plankton sampler in the market lacks scientific and efficient evaluation method. An evaluation method based on aerodynamic particle size spectrometer was used to test the collection efficiency of two kinds of domestic plankton samplers. It was found that sampling flow rate, the height of agar and the distance between nozzle and plate would significantly affect the collection efficiency of phytoplankton sampler. The results show that under a fixed sampling flow rate, the closer the petri dish is to the sampling head, the better the collection efficiency.When the distance between petri dish and sampling head is fixed, the collection efficiency increases first and then decreases with the increase of sampling flow rate, and the collection efficiency is the best when the sampling flow rate is 80L/min. The larger the agar thickness, the higher the sampling efficiency. The study has reference significance for improving the structure design of the plankton sampler, improving the product quality, and helping to improve the accuracy and scientificity of the detection of the plankton sampler.
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Received: 15 May 2022
Published: 17 July 2023
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2023, Vol. 44 
