配位吸附波测定粮食中的痕量钼  

Determination of Molybdenum in Bean Samples by Complex Adsorption Wave

作　　者：贺龙强[1] 周长利[1] 张霞[1] 

机构地区：[1]济南大学化学与环境工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2003年第1期15-17,共3页Journal of University of Jinan(Science and Technology)

摘　　要：在0.1 mol/L HAc-NaAc(pH=3.7)介质中,Mo(Ⅵ)-NCP配合物在2.5次微分极谱图上产生良好的吸附还原波。其峰电位为-0.54 V,峰电流与Mo(Ⅵ)浓度在8.0×10-8～6.0×10-6mol/L范围内呈良好的线性关系,检测限为5.0×10～8mol/L。应用该法测定了豆类样品中的微量钼,获得了满意的结果。研究了配合物的组成,极谱波的性质及其机理。In a buffer solution of 0. 1 mol/L HAc - NaAc (pH =3.7), the complex of molybdenum-neocuproine (NCP) was adsorbed on the surface of mercury electrode and produced a reduction peak at - 0. 54 V(vs. SCE). The detection limit and the linear range of the concentration of Mo(Ⅵ) to the single -sweep 2. 5th - order derivative osilloplarographic peek current (e'pp) are 5.0× 10-8 mol/L and 8. 0 × 10-8-6.0×10-6 mol/L Mo(Ⅵ), respectively. The method is applied to the determination of trace Mo(Ⅵ) in bean samples with satisfactory results. The mechanism of the eletrode process is studied.

关 键 词：粮食检测 钼 含量测定 配位吸附波 极谱波 吸附还原波 配合物 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程]