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현재 가능한 작업은 아래와 같습니다.
  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Automated liquid extraction surface analysis in-line coupled with sweeping for rapid and direct analysis of a solid surface sample

2016년 8월 25일 15시 15분 01초
ANAL2.O-15 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 42분
분석화학 - Oral Presentation of Young Analytical Chemists Ⅱ
저자 및
이호균, 최윤정, 정두수*
서울대학교 화학부, Korea
High performance separation and many other advantages such as a small volume sample requirement of capillary electrophoresis (CE) come from the fact of using a narrow-bore fused silica as a separation column. However, the small dimension of the detection path length causes poor detection sensitivity. To overcome this, sample preconcentration technique is needed. There were many preconcentration methods coupled with CE, but almost used liquid sample or homogenized solid bulk sample. Liquid extraction surface analysis (LESA) is a direct surface-sampling technique avoiding the dilution from sample pretreatment procedures including homogenization of a bulk sample. LESA was in-line coupled with homemade CE-laser induced fluorescence (LIF), but homemade CE was operated manually and sample was injected by gravity, so whole extraction procedure needed ~20 minutes. In this study, commercial CE instrument was used for rapid and automatic LESA, and extraction only took ~2 minutes. For separation neutral pesticides efficiently, we use sweeping for detect choloorantranili, kresoxim-methyl and paraclostrobin. The sensitivity was improved by sweeping compare with common micellar electrokinetic chromatography method.