| 摘要 |
PROBLEM TO BE SOLVED: To easily evaluate only the gas constituent of impurities in air, and to monitor behavior for each form of the impurities in the air in real-time by providing a hood part that covers a member for collecting the impurities at prescribed intervals. SOLUTION: A hood part 2 is provided while specific intervals are maintained from a container 1, namely a member for collecting impurities, and the container 1 is covered. Gaseous impurities 7 existing in air are taken into absorption liquid 6 in the container 1 from an opening 3 according to the diffusion speed. Particle-shaped impurities 8 in air pass through the hood part 2 for passing through the opening 3 without diffusing, which is different from gas. Furthermore, even when the passed particle-shaped impurities 8 are brought into contact with an installation surface 9 for bouncing back, height to the opening 3 is secured by a table stand part 4, thus completely preventing the particle-shaped impurities 8 from being taken into the absorption liquid 6, and hence extremely easily and selectively collecting only the gaseous impurities 7 in air.
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