摘要
铌的极谱催化波研究,已有文献报导,所采用的介质,均为硫酸或醋酸盐缓冲溶液,资料介绍过硝酸介质中铌的极谱波研究。S.Zeltzer在1mol/L硝酸溶液中得到铌酸的明晰波,E~1/2为-0.8伏(S.C.E)。
A well-defined catalytic wave was observed in the presence of sulfonitro-phenol C in 0.4 mol/L nitric acid at-0.75 v(S.C.E.).The catalytic current is proportional to the concentration of Nb2O5 between lppb and 100 ppb in a medium of 0.4 mol/L KNO_(3),4×10^(-5)mol/L SNPC and 0.36%tartaric acid.The effects of over 40 cations have been investigated.The interference of Zr(Ⅳ)was eliminated by the addition of EDTA.A complex with a molar ratio of Nb(Ⅴ):tartaric acid:SNPC=1:1:1 was formed.The RSD was 6.9%for the sample containing 0.014%Nb_(2)O_(5)(n=8).
作者
李惠民
卢巽珍
Li Hiumin;Lu Xunzhen
出处
《岩矿测试》
CAS
1987年第1期42-46,I0008,共6页
Rock and Mineral Analysis
