Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.4, 694-699, August, 1997
Setp-Gradient Mode를 이용한 인지질의 분리
Separation of Phospholipids in Step-Gradient Mode
초록
대두에 포함된 유용 인지질 PE, PI, PC를 분리하기 위해서 정상 HPLC를 이용하였다. 이동상으로 hexane, isopropanol, methanol을 사용하였고 일정용매조성법으로는 세 물질을 분리할 수 없었기 때문에 구배용매조성법을 적용하였다. 최적 분리조건을 구하기 위해서 단 이론과 step-gradient mode에서의 용량인자를 계산하는 식으로부터 농도분포곡선을 계산하였다. 계산 결과에 의하면 PE는 일정용매조성법 (hexane/isopropanol/methanol=90/5/5vo1.%)에서 분리하고 PI와 PC를 분리하기 위해서는 10분의 구배시간과 두번째 이동상을 hexane/isopropanol/methanol =50/20/30(vol.%)으로 계단함수의 구배용매조성법을 사용하는 것이다 계산된 최적 분리조건을 실험 data와 비교한 결과 잘 일치하였고 이 제시된 방법은 구배용매조성법에서 최적 분리조건을 구하는데 이용될 수 있었다.
Normal-phase HPLC was used to separate the useful phospholipids, PE, PI and PC in soybean lecithin. The mobile phase used in this experiments were haxane, isopropanol and methanol, the gradient mode was applied as the three components could not be separated by the isocratic mode. To find the optimum separation condition, the concentration profiles of effluents were calculated from the plate theory and the capacity factor in step-gradient mode. From the calcu1ated results, PE was separated with hexane/isopropanol /methanol = 90/5/5vol.% in isocratic mode and PI and PC were resolved in the conditions of 10min gradient time and the second mobile phase of hexane/isopropanol/methanol=50/20/30vol.% in step-gradient mode. The agreement between the calculated concentration profile and experimental data was good, so the methodology developed in this work can be used to obtain the optimum separation condition in gradient mode.
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