离子色谱法同时测定铀矿浸出液中的阳离子

Simultaneous Determination of Cations in Leaching Solution of Uranium Ores by Ion Chromatography

摘要: 研究了离子色谱法同时测定砂岩型铀矿浸出液中阳离子的方法。采用Ionpac CS12A阳离子分离柱,以20 mmol/L甲基磺酸(MSA)为淋洗液,直接电导检测-离子色谱法分离测定铀矿石浸出液中常见的阳离子(Li ⁺、Na⁺、K⁺、NH⁺₄、Ca²⁺、Mg²⁺),方法检出限为0.0127~0.194 mg/L,相对标准偏差(RSD,n=5)为1.04%~4.50%,加标回收率为91.5%~106.0%。该方法用于铀矿石浸出液中的阳离子同时测定,具有很好的实用性。

Abstract: A method for the simultaneous determination of common cations in leaching solution of uranium ores by ion chromatography (IC) is developed. The common inorganic cations and ammonium ion (Li ⁺, Na⁺, K⁺, Ca²⁺, Mg²⁺ and NH⁺₄) were separated using Ionpac CS12A cation exchange column with 20 mmol/L of methanesulfonic acid (MSA) as eluent. The detection limits for common cations and NH₄₊were 0.0127~0.194 mg/L. The recoveries of standard addition for these cations were in a range of 91.5%~106.0% with precision of 1.0%~4.5% RSD (n=5). The proposed method is of high practicability in simultaneous determination of common inorganic cations and ammonium ion in the leaching solution of uranium ores.