This study analyzes the chemical composition of metallic elements and water-soluble ions in PM10 and PM2.5. PM10 and PM2.5 concentrations in Busan during 2010-2012 were 97.2±67.5 and 67.5±32.8 ㎍/㎥, respectively, and the mean PM2.5/PM10 concentration ratio was 0.73. The contribution rate of water-soluble ions to PM10 ranged from 29.0% to 58.6%(a mean of 38.6%) and that to PM2.5 ranged from 33.9% to 58.4%(a mean of 43.1%). The contribution rate of sea salt to PM10 was 13.9% for 2011 and 9.7% for 2012, while that to PM2.5 was 17.4% for 2011 and 10.1% for 2012. PM10 concentration during Asian dust events was 334.3 ㎍/㎥ and 113.3 ㎍/㎥ during non-Asian dust events, and the PM10 concentration ratio of Asian Dust/Non Asian dust was 2.95. On the other hand, the PM2.5 concentration in Asian dust was 157.4 ㎍/㎥ and 83.2㎍/㎥ in Non Asian dust, and the PM2.5 concentration ratio of Asian Dust/Non Asian dust was 1.89, which was lower than that of PM10.

Abstract
 1. 서 론
 2. 시료 채취 및 분석 방법
 3. 결과 및 고찰
  3.1. PM10과 PM2.5의 질량농도 특성
  3.2. 금속성분의 특성
  3.3. 이온성분의 특성
  3.4. 이차생성이온
  3.5. [SO42-/NO3-]의 당량농도비
  3.6. PM10과 PM2.5 중 해염입자의 기여율
  3.7. 황사 시와 비황사 시의 PM10과 PM2.5 중 금속농도와이온농도 특성
 4. 요약 및 결론
 참 고 문 헌

• 전병일(신라대학교 환경공학과) | Byung-Il Jeon (Department of Environmental Engineering, Silla University) Corresponding author
• 황용식(부산대학교 환경보건연구소) | Yong-Sik Hwang (Institute for Environmental Health, Pusan National University)