| 光谱学与光谱分析 |
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| Analyzer Design of Atmospheric Particulate Matter’s Concentration and Elemental Composition Based on β and X-Ray’s Analysis Techniques |
| GE Liang-quan1, LIU He-fan1, 2*, ZENG Guo-qiang1, ZHANG Qing-xian1, REN Mao-qiang1, LI Dan1, GU Yi1, LUO Yao-yao1, ZHAO Jian-kun1 |
1. Key Laboratory of Applied Nuclear Techniques in Geosciences, Chengdu University of Technology, Chengdu 610059, China
2. Sichuan Institute of Atomic Energy, Chengdu 610010, China |
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Abstract Monitoring atmospheric particulate matter requires real-time analysis, such as particulate matter’s concentrations, their element types and contents. An analyzer which is based on β and X rays analysis techniques is designed to meet those demands. Applying β-ray attenuation law and energy dispersive X-ray fluorescence analysis principle, the paper introduces the analyzer’s overall design scheme, structure, FPGA circuit hardware and software for the analyzer. And the analyzer can measure atmospheric particulate matters’ concentration, elements and their contents by on-line analysis. Pure elemental particle standard samples were prepared by deposition, and those standard samples were used to set the calibration for the analyzer in this paper. The analyzer can monitor atmospheric particulate matter’s concentration, 30 kinds of elements and content, such as TSP, PM10 and PM2.5. Comparing the measurement results from the analyzer to Chengdu Environmental Protection Agency’s monitoring results for monitoring particulate matters, a high consistency is obtained by the application in eastern suburbs of Chengdu. Meanwhile, the analyzer are highly sensitive in monitoring particulate matters which contained heavy metal elements (such as As, Hg, Cd, Cr, Pb and so on). The analyzer has lots of characteristics through technical performance testing, such as continuous measurement, low detection limit, quick analysis, easy to use and so on. In conclusion, the analyzer can meet the demands for analyzing atmospheric particulate matter’s concentration, elements and their contents in urban environmental monitoring.
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Received: 2014-12-08
Accepted: 2015-04-20
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Corresponding Authors:
LIU He-fan
E-mail: liuhefan@126.com
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