阴离子树脂预处理-离子色谱法测定核纯氢氧化锂中阴离子杂质
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摘要
采用氨型弱阴离子交换树脂预先对核纯氢氧化锂溶液转型,消除核纯氢氧化锂溶液中的游离氢氧根基体,转型后的溶液采用阴离子色谱法同时测定杂质氟离子、氯离子和硫酸根离子。该方法获得的氟离子、氯离子和硫酸根离子加标回收率优于90%,对应检出限分别为:5.0μg/g、 11.0μg/g和24.0μg/g。
A new method for the determination of F~-, Cl~-and SO_4~(2-)in nuclear grade lithium hydroxide was developed. Lithium hydroxide solution was first treated by acidified NH2-R resin to form a natural solution,then the anion impurities of F-, Cl-and SO_4~(2-)were detected by ion chromatography. The recovery of F-,Cl-and SO_4~(2-)were higher than 90% by standard addition, and the LOD of F-, Cl-and SO_4~(2-)were 5.0 μg/g,11.0 μg/g and 24.0 μg/g, respectively.
A new method for the determination of F~-, Cl~-and SO_4~(2-)in nuclear grade lithium hydroxide was developed. Lithium hydroxide solution was first treated by acidified NH2-R resin to form a natural solution,then the anion impurities of F-, Cl-and SO_4~(2-)were detected by ion chromatography. The recovery of F-,Cl-and SO_4~(2-)were higher than 90% by standard addition, and the LOD of F-, Cl-and SO_4~(2-)were 5.0 μg/g,11.0 μg/g and 24.0 μg/g, respectively.
引文
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[7]朱颖,张鑫,字雨姝.离子色谱法同时测定核纯级氢氧化锂中微量F-和Cl-及SO42-[J].科技创新导报, 2017,(18):97-99.
[8]刘琢艺,冯伟伟,刘伟,等.离子色谱法测定氢氧化锂中F-、 Cl-、 SO42-[J].盐业与化工, 2017, 46(9):8-10.
[2]秦建华,韩玉刚.秦山第二核电厂一回路锂浓度控制[C].中国核学会2009年学术年会. 2009:155-160.
[3]唐占梅,胡石林,张平柱. 316LN在模拟压水堆一回路异常水化学条件下的应力腐蚀敏感性研究[J].原子能科学技术, 2014, 48(11):1 960-1 964.
[4] Naus D J, Oland C B, Arndt E G. Ageing manage-ment of safety-related concrete structures to provideimproved bases for continuing the service of nuclearpower plants[J]. Materials&Structures, 1991, 24(4):308-316.
[5] Hasan鬤ahan Arel, Ertug Aydin, Sudarshan D.Kore. Ageing management and life extension of con-crete in nuclear power plants[J]. Powder Technolo-gy, 2017, 321:390-408.
[6] GB/T11064,碳酸锂、单水氢氧化锂、氯化锂化学分析方法[S].
[7]朱颖,张鑫,字雨姝.离子色谱法同时测定核纯级氢氧化锂中微量F-和Cl-及SO42-[J].科技创新导报, 2017,(18):97-99.
[8]刘琢艺,冯伟伟,刘伟,等.离子色谱法测定氢氧化锂中F-、 Cl-、 SO42-[J].盐业与化工, 2017, 46(9):8-10.