Retention Behavior and Separation of Phenol Derivatives through Cyclodextrin Complexes in Reversed-Phase Liquid Chromatography

역상 액체 크로마토그래피에서 씨클로덱스트린 착물을 이용한 페놀유도체들의 머무름 거동 및 분리

  • Moon, Young-Ja (Department of Food Nutrition, Tae Jeon Vocational Junior College) ;
  • Kang, Sam-Woo (Department of Chemistry, Han Nam University)
  • 문영자 (대전실업전문대학 식품영양과) ;
  • 강삼우 (한남대학교 이과대학 화학과)
  • Received : 1997.11.20
  • Published : 1998.06.01

Abstract

The capacity factor of fifteen phenol derivatives was determined with respect to the concentration of ${\alpha}$- or ${\beta}$-cyclodextrin [CD], the type as well as the content of organic solvent in the mobile phase, and the temperature. The effect of the inclusion complex formation between solutes and ${\alpha}$- or ${\beta}$-cyclodextrin on their retention and selectivity has been investigated. The inclusion effect of ${\beta}$-cyclodextrin was the most effective in aqueous methanol, whereas only a poor effect was observed in aqueous tetrahydrofuran and aqueous acetonitrile. A plot of the reciprocal of the capacity factor against $[CD]_T$ gives a straight line and the dissociation constant, $K_D$ of the inclusion complex can be calculated from the slope. It was possible to estimate the $k_D$ values in 100% water from a linear plot of $pK_D$ vs. water content in the solution by extrapolation. The separation factor, ${\alpha}$, of two compounds has been found to be affected not only by the $[CD]_T$ but also by their $K_D$ values. Under optimum conditions, some mixtures of phenol derivatives were able to separate successfully.