This study aims to investigate the indoor air quality by analyzing PM10 concentration and metallic elements collected from high school( classroom, science room, assembly room). PM10 concentration of a classroom, a science room, and an assembly hall during the research period was 87.7 ㎍/m3, 75.3㎍/m3, 64.6㎍/m3, respectively. Si of PM10 had highest concentration with 15,427 ng/m3 followed by Na which had 7,205 ng/m3, and the order was Si>Na>Ca>Mg>Fe>K in the classroom. PM10 concentration of a classroom and a science room was each 104.8 ㎍/m3 and 75.3 ㎍/m3 during the semester and PM10 concentration of a classroom and an assembly hall was each 80.9 ㎍/m3 and 64.6 ㎍/m3 during the summer vacation. Based on PM10 and metallic concentration at a classroom on day of week, the concentration of Friday was highest with 112.0 ㎍/m3, and that of Monday was lowest with 65.3 ㎍/m3.

Abstract
 1. Introduction
 2. Measurement and methods
 3. Results and discussion
  3.1. Characteristics of concentration of particulatematters in the school
  3.2. Characteristics of metallic element concentrationin PM10 in the school
  3.3. Characteristics of PM10 concentration and metallic
  concentration depending on activities at each place
  3.4. Characteristics of PM10 concentration and metallicconcentration on day of week
 4. Conclusions
 References

• Byung-Il Jeon(Department of Environmental Engineering, Silla University) Corresponding author