【摘要】 在 p H=5 .0的 HAc- Na Ac缓冲溶液中 ,表面活性剂 CPC和乳化剂 OP存在的条件下 ,Eu( )与 5 -Br- PADAP、CPC形成配位比为 1∶ 1∶ 3的深红色络合物。配合物的最大吸收峰位于 6 17nm处 ,表观摩尔吸光系数为 1.4 6× 10 5L· mol-1·cm-1,铕含量在 0— 14 μg/ 2 5 m L范围内符合比耳定律 ,样品加标回收率在 99.7%— 10 1.3%之间。更多还原

【Abstract】 In pH5.0 acetate buffer solution including CPC and OP,europium(Ⅲ) reacts with 2 (5 Bromo 2 pyridylazo) 5 diethylaminophenol,and forms a ternary complex of Eu(Ⅲ)∶5 Br PADAP∶CPC=1∶1∶3 with an maximum absorption at 617nm and an apparent mole absorptivity of 1.46×10 5 L·mol -1 ·cm -1 .Beer’s law is obeyed over the range of 0—14μg/25mL.The recoveries of the method are between 99.7%—101.3%.更多还原