摘要
研究了钒-茜素S络合物在碳糊电极上的吸附伏安行为。在pH5.1的NH_4OAcHOAc缓冲溶液中,钒-茜素S络合物在-0.52V(vs.SCE)产生一灵敏的吸附还原峰,峰高与钒的浓度在2.0×10^(-9)～1.0×10^(-7)mol·L^(-1)范围内呈线性关系,捡出限为8.0×10^(-10)mol·L^(-1)(富集240s)。讨论了电极反应机理,方法已用于水样中痕量钒的测定,结果满意。
A sensitive adsorptive-reduction peak produced by the complex of V(Ⅴ)-alizarin S at paste carbon electrode in an NH_4OAc-HOAc buffer solution of pH 5. 1 was observed at—0. 52V(vs. SCE). The peak heights were found to be in linear relationship with the concentration of vanadium(Ⅴ) in the range of 2.0×10^(-9)～1.0×10^(-7) mol·L^(-1). Detection limit of the method was found to be 8. 0×10^(-10) mol·L^(-1) (preconcentration for 240s). A brief discussion on the mechanism of the electrode reaction was also given. The proposed method has been applied satisfactorily to the determination of trace amounts of vanadium in water samples.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2003年第10期567-568,570,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
钒-茜素S络合物
碳糊电极
吸附伏安法
钒
水样
测定
Adsorptive voltammetry
Vanadium(Ⅴ)
Alizarin S
Paste carbon electrode
Water sample
