摘要
在 0 .0 5mol LHAc NaAc(pH 4 .97)介质中 ,Mo 二溴茜素紫 (DBV)络合物在 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 .33V。其峰电流与Mo 浓度在 5 .0× 1 0 - 8~ 5 .4× 1 0 - 6mol L范围内呈良好的线性关系 ,检出限为 8.0× 1 0 - 9mol L。应用该法测定了豆类样品和钢样中的微量钼 ,获得了满意的结果。研究了络合物的组成。
In a buffer solution of 0.05 mol/L HAc-NaAc(pH 4.97), the complex of molybdenum-dibromoalizarin violet (DBV) was adsorbed on the surface of mercury electrode and produced a reduction peak at -0. 33 V ( vs. SCE). The detection limit and the linear range of the concentration of MOD to the single-sweep 2.5 th-order derivative osilloplarographic peek current (e(p)(circle)) were 8.0x10(-9) mol/L and 5.0x10(-8)similar to5.4x10(-6) mol/L Mo(VI), respectively. The method has been applied to the determination of trace Mo in bean and steel samples with satisfactory results. The mechanism of the eletrode process has also been studied.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第7期843-845,共3页
Chinese Journal of Analytical Chemistry
关键词
钼
二溴苯素紫
络合吸附波
分析
极谱法
molybdenum
dibromoalizarin violet
complex adsorption wave