【摘 要】
：
采用脉冲熔融热导法并结合LECO TC—436氧氮分析仪测定铀铌合金中的氮,讨论了分析功率、助熔剂种类及称样量对测定结果的影响,确定了最佳分析条件。结果表明,本实验测定铀铌
论文部分内容阅读
采用脉冲熔融热导法并结合LECO TC—436氧氮分析仪测定铀铌合金中的氮,讨论了分析功率、助熔剂种类及称样量对测定结果的影响,确定了最佳分析条件。结果表明,本实验测定铀铌合金氮含量的相对标准偏差小于15%,氮的加标回收率为84%～93%,方法的检出下限为20μg/g,与经典凯氏蒸馏法测定的结果基本一致。
The pulse heat of fusion method and LECO TC-436 oxygen and nitrogen analyzer were used to determine the nitrogen in uranium-niobium alloy. The influences of power, flux type and sample weight on the determination results were discussed. The optimum analytical conditions were determined. The results showed that the relative standard deviation of the determination of nitrogen in uranium-niobium alloy was less than 15% and the recovery of nitrogen was 84% -93%. The detection limit of this method was 20μg / g, which was in good agreement with the classical Kjeldahl distillation The results are basically the same.
其他文献
Crimean-Congo hemorrhagic fever (CCHF) is a severe illness with high fatality.Cases are reported in several countries in Africa,Europe,the Middle East,and Asia.
建立了用反相高效液相色谱法测定羟丙基-β-环糊精(HP-β-CD)、甲基-β-环糊精(M-β-CD)以及取代度为1、4、7的3种磺丙基醚-β-环糊精(SPE1-β-CD、SPE4-β-CD、SPE7-β-CD)
利用电感耦合等离子体-原子发射光谱法(ICP-AES)测定不同采收时间(5、6、7、8月和9月)野生羌活药材中K、Na、Al 3种金属元素的含量,应用SPSS16.0分析软件对结果进行统计分析
用0.5mol·L-1的FeCl3溶液作引发剂,采用原位化学聚合法将吡咯单体聚合在Nafion(R)117膜基体中.复合膜的红外光谱图中出现明显聚吡咯(PPy)的特征吸收峰,说明吡咯单体聚合在Na
设计并合成了一种带有1,3,5-三芳基吡唑啉结构单位的季铵盐,采用红外光谱(IR)、核磁共振氢谱(1H-NMR)和质谱(MS)对其结构进行了表征,同时对其水溶性及荧光性能进行了研究,目
目的:建立滴强灵胶囊中3组分的HPLC测定方法。方法:以COSMOSIL C_(18)(250 mm×4.6 mm,5μm)为色谱柱,以醋酸铵溶液[0.25 mol·L~(-1)醋酸铵溶液-0.05 mol·L~(-1)EDTA-2Na溶
The THGEM detector without and with a CsI has been tested successfully. The optimal parame- ters of THGEM have been determined from eight samples. The UV photoe
在自行研制的离子迁移谱仪器上,制备了反应离子质子化水团蔟离子[H+(H2O)n],并研究了甲基异戊酮的迁移谱。甲基异戊酮的产物离子峰的个数由浓度决定,当浓度在0.004μg/L时出
利用压汞法和傅立叶红外光谱分析技术,对研究较少的神府煤样进行了测试与分析。结果表明,孔隙结构会影响煤样自燃的难易,但并不能以此判断煤样是否易燃,还要取决于煤表面活性
In this paper,we obtain some nonoscillatory theories of the functional differential equation (r(t)ψ(x(t))x′(t))′ + f(t,x(t),x(σ(t)))=0,t ≥ to,where r ∈ C1