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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Determination of size distribution and characterization of asian dust using of sedimentation field-flow fractionation (SdFFF)

2011년 8월 1일 16시 26분 12초
Ⅳ-ANAL.P-209 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅳ>
저자 및
김본경, 이승호, 두해양
한남대학교 화학과, Korea
Asian dust is transported into Korean peninsula from China in Spring. It causes environmental and health problems as they carry various toxic compounds. The Asian dust particles are known to have sizes ranging from a few nanometers up to about a few micrometers. The environmental and health effects depend on the size of the dust particles. The small size particles, the farther they are transported, and the deeper they penetrate into the human respiratory system. Sedimentation field-flow fractionation (SdFFF) provides separation of nano to microparticles using a combination of centrifugal force and parabolic laminar flow in a thin ribbon-like channel. In this study, the steric mode of SdFFF (Sd/StFFF) was tested for its capability for determination of size distribution and characterization of the Asian dust particles. Samples were collected in China at different dates. The samples were dispersed in water containing 0.1% FL-70 (an anionic surfactant). The particle size distributions were observed at various experimental conditions. The flow rate, stop-flow time and the field strength (rpm) of the centrifugal field were optimized for SdFFF analysis of Asian dust. The optical microscopy (OM) was also used to study the size and the shape of the dust particles. Results show Sd/StFFF could become a useful tool for size characterization of environmental particles such as the Asian dust.