1. Department of Chemistry, Kyungpook National University, Daegu 702-701, Republic of Korea
2. Division of Mass
Spectrometry Research, Korea Basic Science Institute, Ochang 863-883, Republic of Korea
3. Bruker Daltonik GmbH, 28359 Bremen, Germany
4. United States Geological Survey, Denver
Federal Center, Post Office Box 25046, MS 977, Denver, Colorado 80225,
United States
5. Climate Change Technology Research Division, Korea Institute of Energy Research, Daejeon 305-343,
Republic of Korea
6. Green-Nano Materials Research Center, Daegu 702-701,
Republic of Korea