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本文拟定了矿石中微量铀的极谱测定方法。采用0.4M草酸+0.005%动物胶底液,铀在该废液中有良好的极谱波形,半波电位E_(1/2)=—0.35伏(相对静汞阳极)在5—50微克/毫升铀的浓度范围内,波高和浓度有良好的线性关系。方法的精密度在±5%以内。在此底液中,干扰铀极谱测定的元素例如:铁(Ⅲ)、铜(Ⅱ)、钒(Ⅴ),钼(Ⅵ)、钛(Ⅳ)等可用聚三氟氯乙烯粉-磷酸三丁酯反相分配色层往分离。此方法可用于矿石中极谱法测定微量铀,分析矿样的精密度在±5%之内。
This paper developed a method for the determination of trace uranium in ore by polarography. Using 0.5 M oxalic acid + 0.005% animal glue solution, uranium has a good polarographic waveform in the waste solution. Half-wave potential E 1/2 (= 0.35 V vs relatively static mercury anode) is between 5-50 μg / In the concentration range of uranium, the wave height and concentration have a good linear relationship. The precision of the method is within ± 5%. In the end of the liquid, interference element determination of uranium polarography such as: iron (Ⅲ), copper (Ⅱ), vanadium (Ⅴ), molybdenum (Ⅵ), titanium (Ⅳ) available poly chlorotrifluoroethylene powder - tris Butyl ester reversed-phase partition to the separation. The method can be used for the determination of trace uranium by polarographic method in ore, and the precision of analysis of ore samples is within ± 5%.