摘要
在 PH=4.0的 0.3 mol/L的 HAc-NaAc介质中,钼(Ⅵ)-向红菲啰啉体系在悬汞电极上,于-0.58 V(vs.SCE)电位处得到钼(Ⅵ)-向红菲啰啉络合物的吸附还原波,其1.5次微分伏安图的峰峰值epp与Mo(Ⅵ)在3.0X10-10”~1.2X10-7mol/L浓度范围内呈良好的线性关系,检测限可达8×10-11mol/LMo(Ⅵ).方法用于豆类样品中微量钼的测定,结果较好。
The electrochemical behavior of molybdenum-4, 7-diphenyl-1, 10-bathophenan- throline(BPT) system at a hanging mercury electrode was investigated in a buffer solution of 0. 3 mol/L HAc-NaAc(pH=4. 0). The Mo(Ⅵ)-BPT complex produces a reduction peak at -0. 58 V(vs. SCE). Under optimum conditions the detection limit of Mo(Ⅵ) and the linear range of 1. 5th-order differential linear-sweep adsorption voltammetric peak were 8 × l0-11 mol/L and 3 × 10-10~l. 2 × 10-7 mol/L, respectively. This method has been applied to the determination of molybdenum in samples of beans and peas.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第2期193-196,共4页
Chinese Journal of Analytical Chemistry
关键词
钼
向红菲罗啉
吸附伏安法
钼配合物
Molybdenum, bathophenanthroline,adsorption voltammetry