摘要
在ｐＨ＝９３的１６×１０－２ｍｏｌ／Ｌ硼砂、３６×１０－２ｍｏｌ／Ｌ氨水和１６×１０－５ｍｏｌ／Ｌ百里香酚酞络合剂底液中，稀土百里香酚酞络合剂有一灵敏的极谱波，其二次导数波峰电位为－１０２Ｖ（Ｓ．Ｃ．Ｅ）。波高与稀土离子浓度（４０×１０－７～３６×１０－６ｍｏｌ／Ｌ）有良好的线性关系。考察了影响极谱波的各种因素和共存离子的干扰，将此极谱波应用于钢中轻稀土的测定，结果准确。
A new polarographic system for determination of rare earths (RE) has been presented. A solution consisting of 1610-2 mol/L of Na2B4O7, 3610-2 mol/L of NH3H2O and 1610-5 mol/L of thymolphthalexon (TP) is used as supporting electrolyte. The electric potential of secondary derivative wave peak of the supporting electrolyte is -102 V (S.C.E). The supporting electrolyte has an electric potential of -102 V at its secondary derivative wave peak. The wave length has a good linear relationship with the iron concentration of RE in the range 4010-7 to 3610-6 mol/L various factors affecting the polarographic wave and interference with coexistance irons are investigated. The method has been successfully applied in determination of light rare earths in steel.
出处
《矿冶工程》
CAS
CSCD
北大核心
1999年第2期57-59,共3页
Mining and Metallurgical Engineering
关键词
稀土
极谱
钢
测定
极谱波
配合物
rare earths
thymolphthalexon
polarography
steel
