The method is capable of determining uranium contents of 1-10 000 μg/g with relative expanded uncertainty of 4.
本工作研究铀矿地质样品中铀含量仲裁分析方法——同位素稀释电感耦合等离子体质谱法。
Different physical and chemical conditions such as temperature and oxygen fugacity of different evolutionary stage produce different uranium content.
岩浆不同演化阶段温度、氧逸度等物理化学条件的变化造成两岩体的铀含量和铀的赋存状态差异,致使鲁溪黑云母花岗岩的铀含量低,且铀主要以惰性铀存在,不利于成矿,而下庄二云母花岗岩的铀含量高,铀多以活性铀的形式存在,利于后期热液成矿。
During the Early Archaean only appeared some nuclei of palaeocontinent in small size with low uranium contents in rocks and the sial was formed in the late stage of their evolution.
太古代早期只出现小面积古陆核,岩石含铀量低,硅铝壳演化晚。
Measurement of content of uranium in urine of workers in an uranium mine and analysis of aberration rate of their chromosomes;
铀矿工人尿铀含量测定与染色体畸变率分析
Such 'noise'is undesirable in the analysis of low uranium concentration.
这种“噪音”在分析低含量铀时应当避免。
Determination of U,Th and Tl in Fourteen Chinese Traditional Medicines by Microwave Digestion-ICP-MS
ICP-MS分析14种中药铀、钍、铊含量
Nuclear energy is concentrated, but the fissionable material, uranium 235, is well under 1% of the natural or mined uranium 235.
原子能能量非常集中,但裂变材料铀235在天然铀矿中含量不到1％。
Uranium metal and uranium dioxide powder and pellets determination of nitrogen content method using ammonia sensing electrode???
用氨敏感电极测定铀金属和二氧化铀粉末及芯块氮含量的方法
Calculating the initial uranium content with factor analysis in Xiazhuang ore field
采用因子分析法计算下庄铀矿田航放初始铀含量
Contrast Study on Natural Radioactive Nuclides Contents of Rice between Xiangshan Uranium Deposit Area,Jiangxi and Non-Uranium Depsoit Area
江西相山铀矿区与非铀矿区稻谷中天然放射性核素含量对比研究
Uranium metal, uranium dioxide powder and pellets, and uranyl nitrate solutions Determination of fluorine content Fluoride ion selective electrode method???
金属铀、二氧化铀粉末和芯块、硝酸铀酰溶液中氟含量的测定－－氟离子选择电极法
Thorium ore, uranium ore, or mixed ore of uranium and thorium In which the rate of content weight uranium and thorium is higher than five-ten thousandths.
一钍矿物、铀矿物或铀钍混合之矿物，其含有铀、钍之成份重量比在万分之五以上者。
Determination of moisture in uranium dioxide pellets
GB/T11840-1989二氧化铀芯块水分含量测定方法
Chain-reacting piles, or atomic-power reactors, contain a great quantity of uranium
链式反应堆，即原子反应堆含有大量的铀。
They reported the abnormal uranium content of waters issuing from tuffaceous rocks.
他们发现，从凝灰岩中流出的水中铀含量反常。
A second prerequisite is that uranium 235 must be present in sufficient abundance.
第二个必要条件是，铀235的含量必须够充足。
Determination of uranium content of the water in the Yellow River by fission-track method
用裂变径迹法测定兰州段黄河水中的铀含量
Where the rate of content weight of uranium and thorium in nuclear source material is higher than five-ten thousandths, and the total weight of uranium and thorium does not exceed one kilogram.
三核子原料中含铀、钍成份重量比在万分之五以上，而铀、钍之总重量不超过一公斤者。
Determination of isotopic content and concentration of uranium and plutonium in nitric acid solution - Mass spectrometric method???
硝酸溶液中铀、钚同位素含量和浓度的测定? 质谱法
I measured the activity of a number of minerals; all of then~ that appear to be radioactive always contain uranium or thorium.
我测量了一些矿物的活性，所有显示放射性的物质均含有铀和针。