铝对稀土元素基体效应的研究  

A Study of the Effect of Aluminium on the Matrix Effects of Rare Earth Elements in Inductively Coupled Plasma-Atomic Emission Spectrometry

作　　者：辛仁轩[1] 王建晨[1] 

机构地区：[1]清华大学核能技术设计研究院,北京100084

出　　处：《分析化学》2005年第2期251-253,共3页Chinese Journal of Analytical Chemistry

摘　　要：研究了ICP光源中铝对稀土元素的影响。测定了0～1000mg/L铝(以氯化铝形式)对试液密度、粘 度和提升量的影响。研究了铝对等离子体激发温度,Hα线半宽度及对MgⅡ/MgⅠ强度比的影响。结果表 明,在所研究的Al浓度范围内,只要正确选择适宜的操作参数,铝的影响并不明显。稀土元素谱线强度的测 定显示,在低观测高度处,Al对稀土元素(Eu、La、Nd、Y、Yb)有显著的抑制作用,随着观测高度的增加,Al的 抑制效应逐渐消失。由此推断Al对稀土元素的抑制效应为蒸发原子化干扰,这可能是由于ICP光源中稀土 元素与氧化铝形成难熔和难挥发的稀土铝酸盐类化合物有关。The effects of aluminium on density, viscosity uptake rate of rare earth elements tested solution in inductively coupled plasma source were examined.. The results showed that the level of aluminium < 1000 mg/L did not effect on the physical performance of solution. The excitation temperature H-alpha line width and Mg II/Mg I intensities ratio were not obviously changed with aluminim concentration. Depressin effects of aluminium on rare earth elements were observed. The degree of depression lessened with the increase of observation height. Mechanisms for the aluminium element matrix effects are discussed. The atomizer interference and solute evaporation interference were suggested. The matrix effects of aluminium were formed by lower volatilization and difficult dissociation of composite with RemAlnO3. The analyte atom will be released more slowly in high observation height.

关 键 词：影响 抑制效应 试液 ICP 抑制作用 研究 类化合物 激发温度 谱线强度 基体效应 

分 类 号：O614[理学—无机化学]