| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring device of suspended particulate matter suppressing volatilization of volatile components other than moisture in the suspended particulate matter, when dehumidifying air to be served to weight measurement of the suspended particulate matter.SOLUTION: This device for collecting fine particles in the suspended particulate matter in the atmosphere comprising the fine particles whose particle size is below a prescribed value and gross particles whose particle size exceeds the prescribed value, and measuring the mass of the collected fine particles includes: a classification means for sucking sample air including the suspended particulate matter, removing the gross particles from the sucked sample air, and acquiring fine particle-including air including the fine particles; a drying means for generating mixed air by a mixer by mixing dry air from which the suspended particulate matter is removed, and which is generated by non-heating drying process with the fine particle-including air, to thereby dehumidify the fine particles in the mixed air in the non-heating state; a collection means for collecting the fine particles onto a first filter by guiding the mixed air to the first filter; and a weight measuring means for measuring the weight of the fine particles collected onto the first filter. |
