关键词: 示波极谱法, 钠化合物, 极谱分析, 高氯酸盐, 稀土元素, 电化学分析, 铽, 羟基喹啉类

In this paper the polarographic behavior of terbium-oxine(Ox)- sodium perchlorate system has been studied. In the solution of NaClO4, Ox has a well defined single-sweep polarographic wave P1. After the addition of Tb3+ a new wave P2 appears at more negative potential. A linear calibration curve of the decrease of P1 is obtained in Tb3+ concentration range from 1.0X10-6M to 1.0X10-5M under the optimun conditions of pH4.0-4.5, 0.1M NaClO4-8X10-5M Ox. The wave height of P2 increases linearly with Tb3+ concentration from 3.0X10-6M to 3.0X10-5M in 0.1M NaClO4-2.0X10-4M Ox. It has been shown by applying a number of polarographic techniques that the wave is an adsorptive complex wave. We proposed the reduction processes of the complex and determined the dissocation constants of Ox.

Key words: OSCILLOSCOPIC POLAROGRAPHY, SODIUM COMPOUNDS, POLAROGRAPHIC ANALYSIS, PERCHLORATE, RARE ELEMENT, ELECTROCHEMICAL ANALYSIS, TERBIUM, HYDROXY QUINOLINES