Separation Characteristics of Ibuprofen in Kromasil HPLC Column

Kromasil HPLC 칼럼을 이용한 Ibuprofen의 분리특성 연구

  • Park Joon Sub (Department of Chemical engineering, Chungnam National University) ;
  • Kim Byung Lip (Department of Chemical engineering, Chungnam National University) ;
  • Yoon Tae Ho (Department of Chemical engineering, Chungnam National University) ;
  • Kim In Ho (Department of Chemical engineering, Chungnam National University)
  • Published : 2005.06.01

Abstract

Chiral separation of racemic ibuprofen was achieved on a Kromasil KR100-5CHI-TBB column. Some chromatographic parameters (resolution, number of theoretical plates, HETP, capacity factor) are calculated under different separation conditions such as change of mobile phase compositions (hexane / t-BME : 85 / 15, 75 / 15, 65 / 35, 55 /45) as well as acetic acid concentrations for adjusting pH (0.1 to 1 $v/v\%$). Flow rate versus number of theoretical plates and HETP were compared to evaluate column efficiency. To determine the adsorption isotherms, PIM (Pulsed Input Method) was carried out. At concentrations of racemic ibuprofen between 0.1 and 0.3 mg/ml, S- and R-ibuprofen have the same retention time of 4.48 and 5.81 min. Ibuprofen isotherms show a linear form under concentrations of 0.3 mg/ml with eluent (hexane / t-BME = 55 / 45).

Kromasil HR100-5CHI-TBB 칼럼을 사용하여 HPLC를 통한 비스테로이드 계통의 진통 및 소염제인 racemic ibuprofen의 분리특성을 연구하였다. 이동상의 조성비 변고에 따른 분리도 (resolution), 이론단수 (number o( theoretical plates), 이론단 높이 (HETP: Height Equivalent to a Theoretical Plate), 용량인자 (capacity factor)를 계산하고, 그 결과 정성분석 기준치 이상의 분리도를 갖고 분리시간을 단축할 수 있는 hexane /t-BME의 조성이 55 / 45일 때 $1\%$의 acetic acid를 첨가했을 때의 용매를 최적의 이동상으로 결정했다. 유속에 따른 칼럼의 효율을 비교하기 위한 실험을 통해 유속의 상승은 칼럼의 효율의 감소를 야기하고, 분리도를 감소시킴을 보였다. PIM (Pulsed Input Method)을 사용하여 분석한 결과 ibuprofen 의 농도가 증가할수록 Langmuir 등온흡착식을 따르는 비선형 거동을 보임을 증명하였고, 그 결과 등온흡착식을 결정하였다. 등온흡착식은 S-form과 R-form의 경우 각각 $C_{S,S}=\frac{1.178C_{M,S}}{1+0.019C_{M,S}},\;C_{S,R}=\frac{1.866C_{M,S}}{1+0.017C_{M,S}}$로 결정하였다.

Keywords

References

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