锗（Ⅳ）─苯基荧光酮体系差分脉冲吸附伏安法的研究

Studies on the Adsorptive Complex Voltammetry Of Germanium-Phenylflurone System

在１．４１×１０－２ｍｏｌ／Ｌ的硫酸介质中，锗与苯基荧光酮试剂反应在－０．５７Ｖ（ＶＳ．ＳＣＥ）电位处产生灵敏的络合吸附波．用差分脉冲极谱法测定．该络合吸附波的峰高与锗（Ⅳ）浓度在３．２×１０－８ｍｏｌ／Ｌ－４．０×１０－７ｍｏｌ／Ｌ范围内成正比，检测下限是８．５×１０－９ｍｏｌ／Ｌ．本文详细讨论了测定的最佳条件及电极反应的机理，并用该法测定了人参中锗的含量。

In 0.014mol/L H2SO4 medium,the complex of Ge(Ⅳ) with phenylflurone con produce a sensitive adsorptive reduction Peak at -0.57V(vs.sec),detedted with differential pulse voltammetry,the peak height has a linear relationship with concentration of Ge (Ⅳ) over the range of 3.2×10-8-4.0×10-7 mol/L.It's detection limite is 8. 5 × 10-9 mol/L,the detection optimium condition and mechanism of electrode reaction have been discussed in detail.Themethod has been applied to detect the content of Germanium in Ginseng.The result is satisfactory.