Determinação do coeficiente de atividade na diluição infinita (<FONT FACE=Symbol>g&yen;</FONT>) através da micro-extração em fase sólida (SPME) Determination of activity coefficients at infinite dilution through solid phase microextraction (SPME)

Abstract

In this study a new approach, solid phase micro extraction (SPME), is used in the evaluation of the infinite dilution activity coefficient of the solute in a given solvent. It is the purpose of the current work to demonstrate a different approach to obtain the data needed for studying the solution thermodynamics of binary liquid mixtures as well as for designing multi-component separations. The solutes investigated at the temperature 298.15 K were toluene, ethyl benzene and xylene in the solvent methanol.

Keywords

• solid phase micro extraction (SPME)
• activity coefficient
• separation