摘要
在 0 .0 2mol/LHAc NaAc(pH 4 .9)介质中 ,研究了Sb 7 (1 苯偶氮 ) 8 羟基喹啉 5 磺酸钠 (BQ)体系电化学行为及其影响因素。Sb BQ络合物在滴汞电极上于 - 0 .5 8～ - 0 .6 1V间产生一良好的还原波 ,其一阶导数峰峰值I′p 与Sb 浓度在 8.0× 10 -7～ 1.0× 10 -5mol/L范围内呈线性关系 ,检出限为 4 .5× 10 -7mol/L。用该法测定冶金样品中痕量Sb ,取得了满意结果。
In a buffer solution of 0.02 mol/L HAc-NaAc(pH 4.9),the complex of antimony(III)-7-(1-benzeneazo)-8-hydroxyquinoline-5-sulyonate (BQ) was adsorbed on the surface of mercury electrode and produced a reduction peak at -0.58similar to -0.61 V ( vs. SCE). The detection limit and the linear range of the concentration of Sb(III) to the first order derivative-single sweep oscillopolarograpbic peak current(I-p(')) were 4.5 x 10(-7) mol/L and 8.0 x 10(-7) similar to 1.0 x 10(-5) mol/L Sb(III), respectively. The method has been applied to the determination of micro amounts of Sb in steel with satisfactory results. The mechanism of the eletrode process has also been discussed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第3期331-333,共3页
Chinese Journal of Analytical Chemistry
