The results show that octanol content, pH and ionic strength are key factors. Under the con ditions of low ionic strength(C_kcl=0.05 mol/L),high pH value(pH>13.6 6)and octanol content 0.85%(volume fraction),the extraction efficiency approac hes 100%.

• 结果表明 ；正辛醇的量、水相 pH值是萃取过程的关键因素 ；在低离子强度 (CKCl=0 .；0 5mol/L)、高 pH值(pH =13 6 6 )、含正辛醇体积分数为 0 85%25的情况下；萃取率接近 10 0%25