title: A method for monitoring mass concentration of black carbon particulate matter using photothermal interferometry.
abstract: A method for measurements of mass concentration of black carbon particulate matter (PM) is proposed based on photothermal interferometry (PTI). A folded Jamin photothermal interferometer was used with a laser irradiation of particles deposited on a filter paper. The black carbon PM deposited on the filter paper was regarded as a film while the quartz filter paper was regarded as a substrate to establish a mathematical model for measuring the mass concentration of PM using a photothermal method. The photothermal interferometry system was calibrated and used to measure the atmospheric PM concentration corresponding to different dust-treated filter paper. The measurements were compared to those obtained using β ray method and were found consistent. This method can be particularly relevant to polluted atmospheres where PM is dominated by black carbon.
authors.affiliation: School of Instrument Sciences and Opto-electronics Engineering, Hefei University of Technology, Hefei, 230009, China. libaosheng@hfut.edu.cn.
authors.forename: Baosheng
authors.initials: B
authors.lastname: Li
authors.affiliation: School of Instrument Sciences and Opto-electronics Engineering, Hefei University of Technology, Hefei, 230009, China.
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.
authors.forename: Zhengqiang
authors.initials: Z
authors.lastname: Li
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere; D002244:Carbon / Q000032:analysis; D004391:Dust; D004784:Environmental Monitoring / Q000379:methods*; D005374:Filtration; D007368:Interferometry; D008962:Models, Theoretical; D052638:Particulate Matter / Q000032:analysis*; D011791:Quartz; D053260:Soot / Q000032:analysis
chemical_list: D000393:Air Pollutants; D004391:Dust; D052638:Particulate Matter; D053260:Soot; D011791:Quartz; D002244:Carbon
keywords: Air pollution monitoring; Black carbon; Photothermal spectroscopy