用内标技术测量环境样品中的铀  

Analysis of Uranium in Environmental Sample by Internal Standard Method

作　　者：韩军[1] 傅中华[1] 贾宝亭[1] 刘雪梅[1] 毛欣根[1] 孟繁本[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《核化学与放射化学》2004年第4期239-242,共4页Journal of Nuclear and Radiochemistry

摘　　要：用MAT 262热表面电离型同位素质谱计测定了铀的同位素丰度比。环境样品采用HNO3 HF HClO4混合溶液溶解后,用TBP色层法进行分离纯化,再经电镀制备成供质谱用的测量源。结果表明,所测环境样品中铀的质量分数为:河水,8×10-8;长青树树叶,1×10-7;表层土壤,(5～11)×10-6。Uranium isotope abundance ratios in the uranium samples are detected by MAT-262 thermol ionization mass spectrometry. Before mass spectrometry analysis, samples are dissolved in a concentrated acidic solution containing HNO_3, HF and HClO_4, and chemically processed by use of TBP chromatography and electroplate to suit the analysis requirement. Analysis results indicate that the (uranium) contents are 8×10^(-8) in the river water, 1×10^(-7) in the evergreen leaf, and (5～11)×10^(-6) in the surface soil, respectively.

关 键 词：环境样品 铀 内标技术 同位素丰度比 含量测定 

分 类 号：X132[环境科学与工程—环境科学]