摘要
建立惰气熔融–红外吸收法测定铀金属中氢含量的方法。将铀金属加工为柱状样品,用25%硝酸、去离子水、丙酮清洗并用冷风吹干后测定。对实验条件进行了优化,坩埚脱气功率为3 500 W,脱气时间不低于70 s,脱气次数不低于5次,分析功率为3 000 W,分析时间为60 s。该方法的检出限为0.02μg/g,氢含量为1.05μg/g的铀金属样品测定结果的相对标准偏差为17.9%(n=6),加标回收率为72.5%~127.3%。该方法灵敏、准确,适用于铀金属中微量氢含量的测定。
A method for determining hydrogen content in uranium metal by inert gas fusion-infrared absorption method was established.The uranium metal was processed into columnar sample and cleaned by 25%nitric acid,deionized water and acetone,and dried in cold wind.The experimental conditions were optimized,the degassing power was 3 500 W,degassing time was not less than 70 s,degassing number was not less than 5,analysis power was 3 000 W and the analysis time was 60 s.The detection limit of the method was 0.02μg/g.For uranium metal sample which hydrogen content was 1.05μg/g,the relative standard deviation of detetion results was 17.9%(n=6),the added recovery was 72.5%-127.3%.This method is sensitivity and accurate,it can be used to determine trace hydrogen content in uranium metal.
作者
王涛
黄少荣
代亚会
张庆桂
梅家文
WANG Tao;HUANG Shaorong;DAI Yahui;ZHANG Qinggui;MEI Jiawen(The Fourth Filial Company of 404 Company Limited,China Nationl Nuclear Corporation,Lanzhou 732850,China)
出处
《化学分析计量》
CAS
2018年第2期44-48,共5页
Chemical Analysis And Meterage
关键词
惰气熔融
铀金属
红外吸收法
氢含量
molten with inert gas
uranium metal
infrared absorption method
hydrogen content
