分析测试学报2024，Vol.43Issue(6)：913-920,8.DOI:10.12452/j.fxcsxb.24022204
用于生物气溶胶质谱检测的泵送逆流虚拟切割器研究
Research on Pumped Counterflow Virtual Impactor for Bioaerosol Mass Spectrometry Detection
摘要
Abstract
Single particle aerosol mass spectrometer(SPAMS)can provide high time resolution and high sensitivity characteristics of particle size distribution and mass spectrometry composition data,and is widely used in the fields of atmospheric aerosol detection and atmospheric scientific research.In the atmospheric environment,sedimentation causes the concentration of large micron-sized parti-cles in the air to be much smaller than that of small sub-micron-sized particles,and there is an order of magnitude difference in the number of particles.In the detection of single particle aerosol mass spectrometry,particles are accelerated through aerodynamics and empowered,which makes small particles fly faster than large particles.This ultimately leads to a significant reduction in the detection probability of single particle mass spectrometry when analyzing large particles such as bioaerosols.Therefore,how to separate large particles from small particles has become the key to improving the effective detection of bioaerosol large particles by SPAMS.This study designed a pumped counterflow virtual impactor(PCVI).Through 3D modeling,computational fluid dynamics(CFD)simulation,actual experimental testing and detection of algae aerosol,the implementation principle,data simu-lation,and performance verification and practical application.It is combined with SPAMS to form a PCVI-SPAMS system with cutting capabilities for fine particles.Algae bioaerosol detection has con-firmed that the developed PCVI can effectively remove particles with a minimum particle size of less than 2 μm,successfully segment the background of small particles,and achieve expected results.关键词
单颗粒气溶胶质谱(SPAMS)/泵送逆流虚拟切割器(PCVI)/粒径筛分/生物气溶胶检测Key words
single particle aerosol mass spectrometer(SPAMS)/pumped counterflow virtual impac-tor(PCVI)/particle size screening/bioaerosol detection分类
化学化工引用本文复制引用
黄罗旭,苏展民,杜绪兵,黄正旭,李梅,周振,李雪,李磊..用于生物气溶胶质谱检测的泵送逆流虚拟切割器研究[J].分析测试学报,2024,43(6):913-920,8.基金项目
国家重点研发计划青年科学家项目(2022YFF0705400) （2022YFF0705400）
暨南大学科协青年科技人才托举工程项目(21623205) （21623205）
