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在PH=5的1M NH_4AC溶液中,锡—BPHA络合物在单扫描示波极谱仪上有一灵敏的极谱吸附波。其峰电位为-0.72V(VS.SCE),峰电流与锡浓度在1.7×10~(-6)—3.4×10~(-5)M范围内呈线性关系。其检测限为3.0×10~(-7)M。应用于青铜中锡的测定,结果良好。对极谱波的性质进行了讨论。
The tin-BPHA complex has a sensitive polarographic adsorption wave on a single-scan oscilloscope in the 1 M NH4AC solution at pH = 5. The peak potential was -0.72V (VS.SCE). The peak current was linear with the concentration of tin in the range of 1.7 × 10 -6 -6.4 × 10 -5 M. The detection limit was 3.0 × 10 ~ (-7) M. Used in bronze tin determination, the results are good. The nature of polarographic waves is discussed.