硝酸镁对GFAAS法测定微量铍的基体改进效应  

Effect of Mg(NO_3)_2 as the Matrix Modifier in Determination of Trace Beryllium by Graphite Furnace Atomic Absorption Spectrometry

作　　者：宋建刚[1] 

机构地区：[1]中国工程物理研究院,四川绵阳919信箱71分箱621900

出　　处：《光谱实验室》2006年第6期1299-1302,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：以硝酸镁作为GFAA S法测量微量铍的基体改进剂,研究了硝酸镁对石墨炉灰化和原子化的影响,探讨了硝酸镁的作用机理。结果表明,硝酸镁能提高灰化温度,降低原子化活化能,并对吸收信号有延迟作用,从而有利于消除基体干扰,提高分析灵敏度。Magnesium nitrate as matrix modifier in the determination of trace beryllium by GFAAS was studied. The effect mechanism of Mg （NO3）2 on ashing and atomization was studied. Mg（NO3）2 as matrix modifier can raise the ashing temperature,decrease the atomization activation energy and delay the absorption signal. So it was helpful in the elimination of matrix interference and improvement of sensibility.

关 键 词：铍 硝酸镁 石墨炉原子吸收法 基体改进剂 

分 类 号：O657.31[理学—分析化学]