【摘要】 在ｐＨ５．８乙酸盐缓冲溶液中，Ｖ（Ⅴ）－７－碘－８－羟基喹啉－５－磺酸－ＮａＢｒＯ３体系产生一灵敏的吸附平行催化波，二次导数峰高与Ｖ（Ⅴ）浓度在２．９×１０－９～４．７×１０－７ｍｏｌ／Ｌ范围内呈线性关系，检出限为１×１０－９ｍｏｌ／Ｌ．研究了电极反应机理，方法应用于水中钒的测定，结果满意．更多还原

【Abstract】 In the 0.1mol/L acetate buffer solution （pH5.8） containing 2.0×10 -6 mol/L Ferron and 0.1 mol/L NaBrO₃, a sensitive polarographic adsorptive catalytic wave of V（Ⅴ）Ferron complex was obtained by single-sweep polarography.The peak potential of this wave appears at -0.85V （vs.SCE）.The change of the peak height with the concentration of V（Ⅴ）is linear in the range from 2.9×10 -9 mol/L to 4.7×10 -7 mol/L.The detection limit is 1×10 -9 mol/L .The mechanism of the electrode reaction has been studied and the proposed method has been successfully applied to the determination of V（Ⅴ） in water.更多还原