吸附还原计时电位溶出法测定钯  

Study on the Chronopotentiometry Stripping Analysis of Adsorptive Reduction of Palladium(Ⅱ)-1(2-Pyridylazo)-2-Naphthol Complex

作　　者：王晓良 王曙[2] 

机构地区：[1]陕西钢铁研究所 [2]四川轻化工学院

出　　处：《贵金属》1997年第2期45-48,共4页Precious Metals

基　　金：四川教委科研基金

摘　　要：用悬汞电极在ＨＡｃ－ＮａＡｃ介质中（ｐＨ４２），用还原计时电位溶出分析法研究了Ｐｄ（Ⅱ）－１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）络合物。其适宜条件为：ＮａＣｌ０１６ｍｏｌ／Ｌ，ＰＡＮ６０×１０－６ｍｏｌ／Ｌ，乙醇１０％（Ｖ／Ｖ），电解电位０００Ｖ（ｖｓＳＣＥ）。线性范围为２４×１０－１１～９４×１０－８ｍｏｌ／Ｌ，络合物组成为Ｐｄ（Ⅱ）：ＰＡＮ＝１∶１。试验了２０多种金属离子的干扰影响。本法用于矿石中Ｐｄ的测定，结果满意。Palladium(Ⅱ)- 1(2- Pyridylazo)- 2- Naphthol (PAN) complex in HAc- NaAc (pH4.2) solution with hanging mercury dropping electrode (HMDE) has been studied. The optimum conditions are: NaC1 0.16mol/L; PAN6.0×10 -6 mol/L; ethyl alcohol 10%(V/V); electrolysis potential 0 00V (vs. SCE) The change of peak height with concentration of palladium is linear in the range of 2 4×10 -11 ～9 4×10 -8 mol/l. The composition of complex is Pd(Ⅱ):PAN= 1∶1. The interferences of more than twenty kinds of metal ions were investigated. This method has been used successfully for determinetion of trace palladium in ores with satisfactory results.

关 键 词：炼钯 计时电位溶出法 吸附 还原 矿石 

分 类 号：TF836.021[冶金工程—有色金属冶金] TF836.013