空气-乙炔焰中高氯酸镧对锶的增感效应及其分析应用

Enhancement Effect of La(ClO 4) 3 on the Determination of Strontium by Air acetylene Flame Atomic Absorption Spectrometry and Its Application

本文试验了稀土元素对空气－乙炔火焰原子吸收测定锶的影响，并且选择镧作了重点研究。发现不同镧盐对测定锶的影响各不相同。当存在每ｍＬ１５００μｇ镧（高氯酸盐）时，硝酸浓度在比较宽的范围内不影响锶的测定。本文建立了Ｓｒ－Ｌａ（ＣｌＯ４）３－ＨＮＯ３体系中测定锶的新方法。该方法用于人工混合稀土样品中Ｓｒ的测定，获得满意的结果。

This paper reports the effects of rare earth elements on the determination of strontium by air acetylene flame atomic absorption spectrometry.Lanthanum was selected for detailed study .The results indicated that the effects were different for different kinds of lanthanum salts .In the presence of 1500mg/L La(La(ClO 4) 3),the change in nitric acid concentration did not influence the determination of strontium in a wide range.A new method has been established for the direct determination of strontium in Sr La(ClO 4) 3 HNO 3 system.It was used to the determination of strontium in synthetic rare earth mixtures with satisfactory results.