【摘要】 本文研究了锡-氟隆络合物极谱测定条件。用钒(Ⅳ)作为氧化剂产生动力催化波叠加至锡-氟隆络合物吸附波上,使测定灵敏度提高。在0.018mol/L硫酸-0.0024mol/L钒(Ⅳ)-0.04mol/L氯化钠底液中锡与氟隆络合物具有波形好、灵敏度高且稳定的极谱催化波,导数波峰电位-0.45伏(VS.S.C.E.),锡在0.016-0.64微克/毫升范围峰高与浓度呈线性关系。锡与干扰元素的分离采用锡氢化物气化法。用拟定的方法测定三氧化钨及三氧化钼中微量锡,获得了满意结果。更多还原

【Abstract】 The conditions for polarographic determination of tin-ferrone complex was studied. Vanadium(Ⅳ)is chosen as oxydant to produce a kinetic catalysis wave. The kinetic wave overlapped on the wave of tin-ferrone adsorptive complex, thus the sensitivity of determination enhances. The complex of tin with ferrone produces a welldefined and sensitive catalytic wave in 0.08 mol/L sulfuric acid-0.0024 mol/L vanadium (Ⅳ)-0.04 mol/L sodium chloride support solution. The peak potential of derivative wave is - 0.45 V(VS. S. C. E.). Linear relationship between wave height and concentration of tin holds in the concentration range of 0.016—0.64 μg Sn per mL. The tin can be saperated from interfering ions by converting into gaseous tin hydride. This method can be applied to the determination of trace amouts of tin in tungstic and molybdic oxides with satisfactory results.更多还原