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.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2004年第4期239-242,共4页
Journal of Nuclear and Radiochemistry
关键词
环境样品
铀
内标技术
同位素丰度比
含量测定
internal standard method
mass spectrometry
environmental samples
uranium
