实验考察了氢型、钠型、氨型大孔弱酸性树脂Amberlite IRC-50吸附与解吸?-聚赖氨酸(?-PL)的条件，并研究了3种树脂的动态吸附与洗脱过程. 静态实验结果表明，3种树脂吸附?-PL的最适pH值均为8.0，吸附量分别为238.7, 293.3和298.1 mg/g；3种树脂的最佳洗脱剂浓度均为0.1 mol/L，洗脱率均达到96%以上；钠型和氨型树脂吸附所得?-PL纯度比氢型树脂提高12%，吸附速率常数是氢型树脂的近2倍，更适用于?-PL的分离与提取.

The adsorption capacity and elution rate of H+-form and Na+-form as well as NH4+-form Amberlite IRC-50 (IRC-50) resins for ?-poly-L-lysine (?-PL) at different pH values and eluant concentrations were evaluated by static adsorption experiment. Meanwhile, the dynamic adsorption and elution processes of three forms of IRC-50 resins were also studied. The results revealed that the optimum pH value of three forms of IRC-50 resins for ?-PL adsorption was 8.0, the saturated adsorption capacity were 238.7, 293.3 and 298.1 mg/g, respectively. In addition, the optimum concentration of the eluent for three forms of IRC-50 resin was 0.1 mol/L, and the elution rate reached more than 96%. The results of dynamic adsorption and elution experiments indicated that the purity of ε-PL obtained by Na+-form and NH4+-form resins were 12% higher than that of H+-form resin. Moreover, the kinetic adsorption rate constants for Na+-form and NH4+-form resins are nearly 2 times more than that of H+-form resin. Therefore, Na+-form and NH4+-form resins are more suitable for the separation and extraction of ?-PL than H+-form resin.