气体中微米级颗粒的数量浓度溯源技术研究  

Traceability Research of Airborne Particle Number Concentration in Micrometer-scale

作　　者：郭黎旭 刘俊杰[2] 刘悦 叶婧 任军 GUO Li-xu;LIU Jun-jie;LIU Yue;YE Jing;REN Jun(College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Environment Metrology Center,National Institute of Metrology,Beijing 100029,China)

机构地区：[1]太原理工大学化学工程与技术学院,山西太原030024 [2]中国计量科学研究院环境计量中心,北京100029

出　　处：《计量学报》2023年第11期1755-1762,共8页Acta Metrologica Sinica

基　　金：中国计量科学研究院能力提升专项(ANL2203);中国计量科学研究院基本科研业务费(AKYZD2207-4,AKY1809)。

摘　　要：为建立气体中微米级颗粒数量浓度的量值溯源链,开展了基于喷墨原理气溶胶发生器(NIM-IJAG)的研制和性能验证。喷墨气溶胶发生器(NIM-IJAG)所发生的固体颗粒粒径及浓度值与喷嘴孔径、溶质密度、溶液浓度、电控参数、洁净空气流量等参数密切相关,其中在准确获得液滴粒径的前提下,通过改变溶液浓度,可实现对固体颗粒样品粒径的有效控制,通过调节发生频率可实现对固体颗粒样品数量浓度的有效控制。经实验验证,NIM-IJAG可产生粒径值在1~20μm范围、颗粒数量浓度在0~30个/cm^(3)范围的单分散固体颗粒样品,颗粒数量浓度的量值可溯源至国家计量标准。To study the traceability technology of the number concentration of airborne particles in micrometer range,an inkjet aerosol generator(NIM-IJAG)is developed and its performance is verified.The particle size and number concentration of obtained solid particles by NIM-IJAG are closely related to the nozzle aperture,solute density,solution mass concentration,output parameters of electrical controller,clean air flow volume and other parameters.On the basis of accurately obtaining the droplet size,the effective control of the particle size of solid particles can be achieved by changing the solution concentration,the number concentration of solid particles could be effectively controlled by adjusting the voltage frequency applied on the nozzle.Through experimental verification,NIM-IJAG can produce 1~20μm monodisperse solid particle samples with number concentration in 0~30/cm^(3),which can trace to the national metrology standard.

关 键 词：计量学 气溶胶颗粒 颗粒数量浓度 溯源技术 喷墨气溶胶发生器 

分 类 号：TH99[机械工程]