摘要
在含有0.3mol.L^(-1)HAC-NH_4AC(pH=5.8)和2.0×10~5mol.L^(-1)PV 溶液中,可得到铟(Ⅱ)-PV 配合物极谱波。峰电位在-0.69V(VS.SCE)处,其导数峰高与铟(Ⅲ)在0.020～0.400mg.L^(-1)范围内的浓度有良好的线性关系,最低检出限为0.005mg.L^(-1)。研究了该波的机理,证明是一种配合吸附波,并应用于轴承镀层中铟含量的测定。
In a supporting electrolyte containing 0.3 mol/L NH_4AC-HAC.2.0×10~ mol/L PV and at pH5.8.a sensitive complex wave can be obtained by single-sweep polarography.The peak po- tential is—0.69V(VS.SCE).A good linear relationship between the peak and concentration of In was found in the range of 0.020～0.400 mg/L.The limit of detection for indium is 0.005 mg/L. The behavior of polarographic complex-wave is presented.It is shown that this is a kind of ad- sorptive wave and can be used to determine the Indium content in the plating layer for bearings.
关键词
铟
邻苯二酚紫
配合物
吸附波
indium
pyrocatechol violet(PV)
single-sweep polarography.
