光吸收法测量颗粒物方法的校准研究  

Calibration Study of Measurement of Particulate Matter by Optical Absorption Method

作　　者：刘宪云[1] 夏丽[1] 方佳怡[1] LIU Xian-yun;XIA Li;FANG Jia-yi(Changzhou University,Jiangsu Changzhou213164)

机构地区：[1]常州大学,江苏常州213164

出　　处：《大学物理实验》2017年第6期37-40,共4页Physical Experiment of College

基　　金：信息数理学院教研课题(2015XSJY12);国家自然科学基金青年项目(11404039)

摘　　要：鉴于目前大气悬浮颗粒物的排放日益严重,对全球气候、环境产生重要影响,由于大气悬浮颗粒在特定波长下的吸收和散射,气溶胶颗粒的吸收系数相对较小,因此不能消除光吸收系数测量的散射,难以精确测量吸收系数。本文用大气悬浮颗粒物吸收系数来衡量光在大气传播过程中的强弱,并利用大气悬浮颗粒物吸收系数来估计大气悬浮颗粒物的辐射强度,对如何准确测量悬浮颗粒物吸收系数进行了研究。本研究使用自行研制的自动连续黑碳气溶胶测量系统COSMOS进行测量,精确测量吸收系数。研究结果表明本论文提出的系统和校准方法测量的黑碳气溶胶浓度具有精度高,成本低的优点,其测量结果跟商品化仪器测量结果大致一样。The increasing emission of the atmospheric aerosol,cause a significant influence on global climate and the atmospheric environment.Due to the absorption and scattering of atmospheric suspended particles at specific wavelengths,the absorption coefficient of aerosol particles is relatively small,so that the scattering of the light absorption coefficient can not be eliminated,and it is difficult to accurately measure the absorption coefficient.In regard to this,this paper measured the intensity of light in the atmospheric propagation process by using the absorption coefficient of atmospheric particles,estimated the radiation intensity of atmospheric particles by absorption coefficient of atmospheric particles.,and investigated how to accurate measurement of atmospheric particulate's absorption coefficient.The research progress of calibration about light absorption method measuring particulate matter is discussed in detail in this paper,using self-developed continuous soot monitoring system(COSMOS)instruments to measure the concentrations of Black Carbon(B C)aerosol.Research and analysis in this paper shows that the proposed system and calibration method for measurements of Black Carbon aerosol,s concentrations can have the advantages of high accuracy and the low cost,and the results of the commercial instrument are roughly the same.

关 键 词：大气悬浮颗粒物 颗粒物浓度 光吸收 吸收系数 

分 类 号：O551.1[理学—热学与物质分子运动论]