The sample preparation by the filter paper method and the direct determination of major (thulium)and five neighbouring micro-rare earth element impurities in pure thulium oxide by XRF are described.
本文拟定了一种采用滤纸片法制样，X射线荧光直接测定纯氧化铥中氧化铥主量以及氧化钬、氧化铒、氧化镱、氧化镥和氧化钇等稀土杂质含量的分析方法。
Purifying Gallium Only by this way, because of some major impurities separated out seriously, often forms individual impurity element to exceed mark, and causes product grade to reduce.
单一电解法提纯镓，由于一些主要杂质析出严重，常常形成个别杂质元素超标，造成产品品级降低。
The re impurities in 4n lutecium oxide are determined by ICP-AES in this paper. The effects of matrix concentration acidity on tested element are analysed.
采用ICP - AES法测定4N氧化镥中稀土杂质，考察了基体浓度、酸度对被测元素的影响。
One method which can be used in analyzing rare element Nb in the presence of Ta and other impurities is proposed in the paper.
提出了一种从钽和其它杂质中测定稀有元素铌的方法。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
The effects of impurities in the fuel and the graphite element in the core and those in the reflector graphite on the reactivity of the reactor were considered in detail.
还详细考虑了堆芯燃料球和石墨球以及反射层石墨中杂质对反应性的影响。
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