摘要
在HNO_3介质中,Nb(V)—酒石酸—偶氮胂Ⅲ体系形成—灵敏的催化波,峰电位为-0.76V(vs.SCE),络合物的络合比为Nb(V):酒石酸:偶氮胂Ⅲ=1:1:1,对极谱波的性质和机理进行了探讨,证明该波为吸附催化波,拟定了一个不经分离、在样品分解后直接测定试液中微量铌的方法.
A sensitive catalytic wave of Nb(V)with tartaric acid and arsenazo Ⅲ was observed in. HNOs supporting electrolyte.In 0.5mol/L HNO3 0.48%tartaric acid and 0.006% arsenazoⅢ , the peak potential of the wave is -0.76V(vs.SCE).The linear relationship between peak current and concentration of Nb2O5 holds in the range of 0.005-9.16ug/ml.The machanism of the wave has been investigated. The method is successfully applied to the dstarminatioa of micro amounts of Nb in minerals and ores.
出处
《冶金分析》
CAS
CSCD
北大核心
1991年第1期24-27,共4页
Metallurgical Analysis
