一、引言我们曾研究过纯钠盐中硫酸根的间接极谱测定和铀酰离子与硫酸根的分离,这些方法用于铀浓缩物中硫酸根的测定是困难的。因为在低酸度下试样不易溶解;而在高酸度下,离子交换分离又较困难。另外,当铀、铁、铝等阳离子以离子交换法分离后,某些阴离子,如磷酸根、硅酸根等对硫酸根的测定也有干扰。 I. INTRODUCTION We have studied the indirect polarographic determination of sulfate in pure sodium salts and the separation of uranyl ions from sulfate. These methods are difficult for the determination of sulfate in uranium concentrates. Because of the low acidity of the sample is not easy to dissolve; and in high acidity, ion exchange separation and more difficult. In addition, when the uranium, iron, aluminum and other cations separated by ion exchange, some of the anions, such as phosphate, silicate and other determination of sulfate also interfere.