摘要
在0.05mol·L-1氯乙酸 氯乙酸钠(pH3.0)介质中,In(Ⅲ)与二溴邻苯二胺双草酰胺酸酯(DBPMACE)生成配合物,并吸附于电极表面,于-0.63V(vs.SCE)得到配合物吸附还原波。其二次微分极谱峰电流与In(Ⅲ)浓度在7.5×10-8～3.4×10-6mol·L-1内呈良好的线性关系,检出限为1.5×10-8mol·L-1。应用于陶瓷颜料、矿石中微量铟的测定,结果满意。并对电化学反应机理进行了初步探讨。
In a chloroacetic acid and sodium chloroacetate buffer medium of pH 3.0 a complex is formed between In(Ⅲ) and DBPMACE and is adsorbed on the surface of mercury electrode producing a reduction peak at (-0.63V) (vs. SCE). Linearity between the peak current (I″_p) of the single-sweeping 2nd derivative oscillopolarogram and the concentration of In(Ⅲ) was held in the range 7.5×10^(-8)～3.4×10^(-6)mol·L^(-1) of In(Ⅲ), and the detection limit was found to be 1.5×10^(-8)mol·L^(-1). The mechanism of the electrode process was also studied. This method has been satisfactorily applied to the determination of trace amounts of indium in dyestuff and ore samples.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2004年第1期6-8,11,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
