摘要
在 p H = 7.7 的 B R 缓冲溶液中,铀(Ⅵ)与偶氮胂(Ⅲ) 反应形成配合物,于- 0.73 V(vs. S C E)处产生一灵敏吸附极谱波.检测下限为 8.0×10- 9m ol· L- 1,测得铀(Ⅵ)与偶氮胂(Ⅲ)的配合比为 1∶1.配合物稳定常数 1.12×107,配合物还原的电子转移数为 2.用该法测定了水样中的铀含量。
In the medium of B R(pH=7.7),U(Ⅵ)reacts with Arsenazo(Ⅲ)to form a complex which gives a sensitive polaraphic wave at -0.73V(vs. SCE).The peak height was in proprtion to the concentration of U(Ⅵ)in the range of 2.1×10 -8 ~4.6×10 -7 mol·L -1 .The properties of the polarographic wave and mechanism of electrode reaction were stuided.The composition of the complex was 1∶1. The method has been used to determine trace amount of U(Ⅵ)in water.
出处
《河北师范大学学报(自然科学版)》
CAS
1999年第3期382-384,共3页
Journal of Hebei Normal University:Natural Science