Study of ethidium bromide adsorption on XAD-7 resin

Química Nova

Hilsdorf, Alexandre W. S.¹  Silva, Astréa F. de Souza¹  Oliveira, André Fernando¹  Oliveira, Mônica Winkler de¹  Universidade de Mogi das Cruzes, Mogi das Cruzes, Brasil¹ 

关键词: ethidium bromide;    XAD-7 resin;    adsorption isotherm.;   

DOI  :  10.1590/S0100-40422009000500010

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The adsorption of ethidium bromide on XAD-7 resin was studied. The Freundlich model was the most representative isotherm model to describe the sorption behavior. A solid-liquid equilibrium model was proposed to explain the resin mass influence on the sorption. The equilibrium constant value estimated was 2.31. The results showed an ethidium bromide ion-pair physical adsorption, with adsorption enthalpy equals to -19.33 kJ/mol. A pK2 value equals to 4.69 ± 0.01 was estimated by two distinct methods. The results will be applied to the ethidium bromide preconcentration aiming its decomposition.

【 授权许可】

Unknown