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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A new C18 phase based on silica monolith particles showing enhanced separation efficiency in HPLC

2015년 9월 2일 14시 34분 47초
ANAL2.O-10 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 15시 : 09분
분석화학 - Oral Presentation of Young Analytical Chemists II
저자 및
AliAshraf, 정원조*
인하대학교 화학과, Korea
Partially or fully sub-2?m porous silica particles have proved strong feasibility as column packing material due to enhanced separation efficiency and rapid separation in liquid chromatography. Partially sub-2 ?m porous silica monolith particles of relatively uniform size have been successfully prepared by sol gel process followed by grinding and calcinations at 550˚C. The production scale has been increased twenty times in comparison to our previous study. These particles were derivatized with C18 (chlorodimethyl octadecylsilane) ligand in anhydrous toluene under reflux followed by end capping with HMDS (hexamethyl disilazane) and TMCS (trimethyl chlorosilane). The C18 bound phase was washed thoroughly and packed in a glass-lined stainless steel micro-column (1.0 mm ID and 300 mm length) using a slurry packer at a high packing pressure (18000 psi). The separation efficiencies as high as 139,000 N/m were achieved for a test mixture containing benzene and its four derivatives in 60/40 acetonitrile/ water (v/v %) with 0.1% TFA at a flow rate of 25?L/min. The separation efficiency of current stationary phase is better than that of common commercial C-18 phase. This new phase also has shown the promising possibility for fast analysis when packed in a short column.