采样流量和孔板间距对浮游菌采样器采集效率的影响

Effect of Sampling Flow Rate and Nozzle-plate Spacing on Collection Efficiency of Plankton Sampler

浮游菌采样器作为一种高效的撞击采样器,具有易操作、小巧便携等特点,广泛应用于药厂洁净间、卫生防疫等场所。目前市场上的浮游菌采样器采集效率缺乏科学、高效的评价方法。采用基于空气动力学粒径谱仪的评价方法,分别检测2种国产浮游菌采样器的采集效率,发现采样流量、琼脂高度以及孔板间距(喷嘴到采集板距离)等因素会显著影响浮游菌采样器采集效率。研究表明,在固定采样流量下,孔板距离越近,采集效率越好;在孔板距离固定条件下,随着采样流量增大,采集效率会出现先增大后降低的特性,在采样流量为80 L/min时的采集效率最好;琼脂厚度越大,采集效率越高。该研究对改进浮游菌采样器的结构设计、提高产品质量具有参考意义,有助于提高浮游菌采样器的检测准确性和科学性。

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 80 L/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.