PARTIAL SOLUBILITY PARAMETERS OF CHLOROBENZENE AND CHLOROPHENOL COMPOUNDS AT EQUILIBRIUM DISTRIBUTION IN TWO IMMISCIBLE PHASES

Ching-Guang Jaw, I-Ming Chen, Jui-Hung Yen and Yei-Shung Wang*

Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan

ABSTRACT

Partial solubility parameters of chlorobenzene and chlorophenol compounds at equilibrium distribution in two immiscible phases such as soil-water system were studied.  An integral distribution equilibrium equation is derived from the concept of partial solubility parameters and Flory-Hungins equation.  Twelve chlorobenzenes and nineteen chlorophenols were employed in this study and their partial solubility parameters including dispersion ( δ_d ), and polar van der waals ( δ_p ), as well as their electron acceptor and donor solubility parameters ( δ_a and δ_b ) were calculated.  Hildebrand’s solubility parameter ( δ) of the compounds was also obtained by using boiling point and formula.  HPLC was performed by octadecyl-bonded phase as the stationary phase with methanol or acetonitrile as the mobile phase to determine the capacity factor k’ of all compounds for the calculation of δ_a and δ_{b .}