微分吸附计时电位法测定矿石中微量铟  

Determination of micro indium in ore by differential adsorption chronopotentiometry

作　　者：赵敬中[1] 孙德志[1] 

机构地区：[1]聊城大学化学化工学院,山东聊城252059

出　　处：《冶金分析》2004年第4期37-39,共3页Metallurgical Analysis

摘　　要：提出了一种测定微量铟的微分吸附计时电位法。以悬汞电极为工作电极 ,在 0 0 1mol/LHAc -NaAc,5× 10 - 7mol/L芦丁底液中 ,测定铟的线性范围为 1× 10 - 1 0 ～ 1× 10 - 7mol/L ,检出限为 5× 10 - 1 1 mol/L。探讨了影响方法灵敏度的主要因素 ,研究了电极过程。本法用于矿石中微量铟的测定 。An electroanalytical method based on differential chronopotentiometry of indium*#-rutin complex adsorptively accumulated on the surface of a hanging mercury drop electrode(HMDE) for the determination of trace amounts of indium has been developed.Optimum experimental conditions include 0.01 mol/L HAc-NaAc,5×10^(-7) mol/L rutin,and a preconcentration potential of 0.10 V(vs.SCE).Under these conditions,the detection limit and the linear range are 5×10^(-11) mol/L and 1×10^(-10)-1×10^(-7) mol/L,respectively,for an accumulation time of 3 min.The method has been used for the determination of indium in ore with satisfactory results.The electrochemical behaviour of indium-rutin complex on the HMDE was also investigated.

关 键 词：微分 电位法 工作电极 微量 电极过程 吸附 检出限 测定 主要因素 线性范围 

分 类 号：O657.1[理学—分析化学]