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在 pH4.4的 HAc-NaAc 介质中,锑与高铁试剂生成络合物,于-0.59V(vs.SCE)出现一尖锐灵敏的极谱波。峰电流与锑(Ⅲ)浓度在3.3×10~(-8)～3.3×10~(-6)mol/L 范围内呈线性关系。检出限为1.6×10~(-8)mol/L.络合物组成为 Sb(Ⅲ):Ferron=1:2。以巯基棉分离干扰离子,用标样对方法进行验证,结果满意。
In pH4.4 HAc-NaAc media, antimony forms a complex with the HSR reagent and exhibits a sharp and sensitive polarographic wave at -0.59 V (vs.SCE). The peak current has a linear relationship with the concentration of antimony (Ⅲ) in the range of 3.3 × 10 -8 ~ 3.3 × 10 -6 mol / L. The detection limit was 1.6 × 10 ~ (-8) mol / L. The complex consisted of Sb (Ⅲ): Ferron = 1: 2. Sulfhydryl cotton separation interference ions, with the standard method to verify the results were satisfactory.