| 英文摘要 |
Mobile laboratory can enhence the analytical quality and mobility of temporal and special resolution in air quality monitoring. Furthermore, it can provide the understanding where the phot spots are in the air basin and the fates of pollutants in the atmosphere. The goals of this project are to test the performance of candidate instruments to be used in a mobile laboratory, to suggest the equipments speculation for EPA’s monitoring vans, and to assist air quality data verification.
In this project, information about speculations of commercial monitoring vans is obtained and compared. Speculations of different brands’ equipments for regulatory ambient air pollutants, such as nitrogen oxides, surfur dioxide, ozone, carbon mono-oxide, hydrocarbon, and particulate matters, are obtained, including standard ranges, lowest detection limit, response time, zero drift, span drift, etc. The equipments, monitoring instruments, calibration system, data retrieving system, vehicle size and structure, instrument auditing system, and accessories, of monitoring van are also proposed.
Air quality monitoring data/table verified and information analysis are conducted collaboration with EPA air quality monitoring network information center software developing. The format of raw data, related tables and report, and the procedures of validation and ststistical analysis are discussed and determined.
A real-time particulate measuring instrument, Electrical Low Pressure Impactor (ELPI), is used as a candidate to serve in mobile laboratory. The performance of ELPI has been tested in controlled laboratory and ambient atmosphere. In the laboratory tests, the results show ELPI is capable to measure different size range of particles and has good comparison to other instruments. A shaker is applied to understand the effect of vibration to ELPI, and the output shows insignificant impacts. In ambient condition, ELPI shows good sensitivity to concentration evolution and has certain correlation with beta-ray particle measurement instruments.
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