|
|||||
|
|
An automatic device for continuous sampling of the atmospheric aerosol for electron microscopy |
|
| Authors: | M J Heard R D Wiffen |
| Affiliation: | 1. Department of Civil Engineering, Indian Institute of Technology Kanpur, India;2. Department of Physics, Indian Institute of Technology Kanpur, India;3. Department of Computer Science and Engineering, Indian Institute of Technology Kanpur, India;1. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2. Department of Atmospheric Chemistry and Environmental Sciences, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;3. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
| Abstract: | Equipment has been developed which collects a continuous series of 3 h samples of the atmospheric aerosol on a strip of AA Millipore membrane filter. Each sample has an area of 0·35 cm2 and represents a filtered volume of 45 1. The sampler requires reloading at intervals of 8 weeks and collects efficiently over the particle size range 0·01–5·0 μm dia. The incoming aerosol is warmed to evaporate aqueous droplets and the collected samples are maintained at a low relative humidity to prevent deliquescence of hygroscopic particles. The used strip is wound in an open spiral to prevent damage to the surface deposit.Examples are given of some types of short term change which have been observed in the particulate composition of the atmospheric aerosol. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |