Li Baosheng, Wang Yicheng, Li Zhengqiang
School of Instrument Sciences and Opto-electronics Engineering, Hefei University of Technology, Hefei, 230009, China.
Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.
Environ Sci Pollut Res Int. 2016 Mar;23(5):4692-9. doi: 10.1007/s11356-015-5702-1. Epub 2015 Nov 3.
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.
提出了一种基于光热干涉法（PTI）测量黑碳颗粒物（PM）质量浓度的方法。使用折叠式雅满干涉仪，对沉积在滤纸上的颗粒进行激光照射。将沉积在滤纸上的黑碳PM视为薄膜，而将石英滤纸视为基底，建立了用光热法测量PM质量浓度的数学模型。对光热干涉测量系统进行了校准，并用于测量与不同粉尘处理滤纸相对应的大气PM浓度。将测量结果与使用β射线法获得的结果进行比较，发现两者一致。该方法对于以黑碳为主的污染大气尤为适用。
