络合吸附波极谱法测定稀土钢中微量稀土  

Determination of Trace Rare Earth Elements in Rare Earth Steel by Adsorptive Complex Wave

作　　者：毛善成[1,2] 黄宋献[1,2] 

机构地区：[1]江苏淮阴工业专科学校食化系 [2]中南工业大学化学系

出　　处：《分析试验室》1999年第2期80-82,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了在ｐＨ９．２～ｐＨ９．５的ＮＨ３－Ｎａ２Ｂ４Ｏ７介质中，稀土与百里香酚酞的络合物极谱波，波高与镧（Ⅲ）量在４．０×１０－７～３．６×１０－６ｍｏｌ／Ｌ范围内成线性关系。方法已用于稀土钢中微量稀土的测定。In this paper,the adsorptive complex wave of rare earths with thymolphthalexonl(TP) and the polarographic behavior of TP were investigated.In NH 3 Na 2B 4O 7 buffer solution at pH9.2 the complex of rare earths with TP exhibits a well defined wave in single sweep polarography with a derivative peak potential of E P=-1 02 V( vs .SCE),the wave height is proportional to the concentration of La 3+ in the range of 4×10 -7 ～3 6×10 -6 mol/L.This method has been applied to the determination of trace rare earth elements in rare earths steel with satisfactory results.

关 键 词：测定 配合吸附波 极谱法 稀土 稀土钢 

分 类 号：TG142.33[一般工业技术—材料科学与工程] TG142.15[金属学及工艺—金属材料]