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本文报道测定铀的计时电势法研究结果。用磷酸钠-碳酸铵-亚硫酸钠作底液,用金作电极,对铀(VI)进行了计时电势还原。在选定的电流密度下,底液的过渡时间极小,可不用校正,而C_o与τ~(1/2),τ~(1/2)与1/i~0,以及τ~0τ~(1/2)与i~0之间均符合Sand方程式给出的关系。循环伏安图表明,这是一个不可逆的电极反应。测定了几个热力学常数。
This paper reports the determination of uranium by chronopotentiometry. Using sodium phosphate - ammonium carbonate - sodium sulfite as the bottom liquid, with gold as the electrode, the uranium (VI) were timed potential reduction. At the selected current density, the transition time of the bottom liquid is very small, without correction, and C_o and τ ~ (1/2), τ ~ (1/2) and 1 / i ~ 0, and τ ~ 0τ ~ (1/2) and i ~ 0 are in accordance with the relationship given by the Sand equation. Cyclic voltammogram shows that this is an irreversible electrode reaction. Several thermodynamic constants were determined.