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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Headspace in-tube microextraction of chlorophenols by capillary electrophoresis-electrospray ionization-mass spectrometry

2018년 8월 17일 15시 47분 11초
ANAL.P-338 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (금요일) 11:00~12:30
Analytical Chemistry
저자 및
Yun Jung Choi, Joon Yub Kwon, Doo Soo Chung*
Division of Chemistry, Seoul National University, Korea
Capillary electrophoresis/mass spectrometry (CE/MS) is a powerful analytical tool combining high performance separation of CE and information-rich MS. Headspace in-tube microextraction (HS-ITME) is a simplest possible scheme of liquid phase microextraction, providing sample cleanup and enrichment for volatile compounds. As a means of improving the power of CE/MS further, HS-ITME was in-line coupled with CE/MS. When HS-ITME was coupled with CE/electrospray (ESI)-MS, the capillary outlet is exposed to the open air and there was a problem of air plug formation due to evaporation of the run buffer in the capillary. By running a small amount of the sheath liquid during extraction, the evaporation problem was solved. Then without any physical modification of the CE/MS setup, dichlorophenols and trichlorophenols in an acidified aqueous solution were enriched into a basic acceptor plug at the entrance of the capillary. The chlorophenols were enriched about 50 times with a 5-min HS-ITME at room temperature, and successfully analyzed by CE/MS. [1] H. R. Lee, S. M. Cho, J. Kim, and D. S. Chung, J. Chromatogr. A (2014) 117 [2] S. Terabe, Anal. Chem. (2004) 76 [3] S. M. Cho, B. S. Park, W. S. Jung, S. W. Lee, Y. Jung, and D. S. Chung, Talanta. (2016) 729 [4] G. Bonvin, J. Schappler and S. Rudaz, J. Chromatogr. A (2012) 17