This paper suggests a determination method of trace thorium in ores according to DBS-arsenazo and colour-reaction of thorium. 本文根据DBS-偶氮胂与钍(Th)的显色反应,提出了矿石中微量钍(Th)的测定方法。
A reddish-brown mineral containing rare earth metals; an important source of thorium and cerium. 一种红褐色矿物,含稀土金属,是钍(Th)和铈的主要来源。
A few elements, among them uranium and thorium, spontaneously disintegrate into lighter elements by chances. 少数元素,其中有铀和钍(Th),通过它们核的变化自然蜕变成较轻的元素。
Effect of sampling techniques on quantitative analysis of uranium and thorium in Malaysian tin slag waste 取样技术对马来西亚锡渣废料中铀和钍(Th)定量分析的影响
Radioactivity is the energy given off by rays from a few unstable elements such as uranium and thorium. 放射性是某些不稳定元素如铀和钍(Th)的射线放射出来的能量。