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

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^＋、NH4^＋、Ca^2＋、Mg^2＋）,方法检出限为0.012 7-0.194 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。

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（Li^ ＋,Na^＋,K^＋,Ca^2＋,Mg^2＋） and ammonium ion NH4^＋ 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 NH＋4 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.