铋膜电极阳极溶出伏安法测定痕量铟
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摘要
在玻碳电极上预镀铋膜制备铋膜电极,建立阳极溶出伏安法测定溶液中金属铟含量的分析方法。结果表明,在0.1mol/L醋酸-醋酸钠缓冲溶液(pH4.55)中,以3.3×10~(-5)mol/L铜铁灵为络合剂,于-0.7V富集180s时,铟可在铋膜电极上产生灵敏的溶出峰,峰高与铟浓度在10～100μg/L范围内呈线性,溶出电位为-0.88V(vs. SCE)。
A bismuth film electrode was prepared by electrodepositing bismuth film on the glassy carbon. An analytical method for the determination of metal indium in solution by anodic stripping voltammetry was established. The results showed that in 0.1 mol/L acetic acid-sodium acetate buffer solution(pH 4.55), with 3.3×10~(-5) mol/Lcupferron as ligand, indium could produce sensitive dissolution peak on the bismuth film electrode at-0.7 Venrichedfor 180 s, the peak height was linear with indium concentration in the range of 10 ～ 100 g/L, and the dissolution potential was-0.88 V(vs. SCE).
A bismuth film electrode was prepared by electrodepositing bismuth film on the glassy carbon. An analytical method for the determination of metal indium in solution by anodic stripping voltammetry was established. The results showed that in 0.1 mol/L acetic acid-sodium acetate buffer solution(pH 4.55), with 3.3×10~(-5) mol/Lcupferron as ligand, indium could produce sensitive dissolution peak on the bismuth film electrode at-0.7 Venrichedfor 180 s, the peak height was linear with indium concentration in the range of 10 ～ 100 g/L, and the dissolution potential was-0.88 V(vs. SCE).
引文
[1]王伟,李庆辉.铟及其化合物的毒性研究[J].工业卫生与职业病,2000,26(5):309-310.
[2]Alan M Bond.200 years of practical electroanalytical chemistry:past,present andfuture directions illustrated by reference to the on-line,on-stream andoff-line determination of trace metals in zinc plant electrolyte byvoltammetric and potentiometric techniques.AnalChimActa,1999,400(1-3):333
[3]F Lo Coco,P Monotti,V Fiecchiet al.Determination of lead(II)and cadmium(II)in hard and soft wheat by derivative potentiometric stripping analysis.AnalChim Acta,2000,409(1-2):93
[4]J Wang,J Lu,S B Hocevar et al.Bismuth-Coated Carbon Electrodes for Anodic Stripping Voltammetry.AnalChem,2000,72(14):3218.
[2]Alan M Bond.200 years of practical electroanalytical chemistry:past,present andfuture directions illustrated by reference to the on-line,on-stream andoff-line determination of trace metals in zinc plant electrolyte byvoltammetric and potentiometric techniques.AnalChimActa,1999,400(1-3):333
[3]F Lo Coco,P Monotti,V Fiecchiet al.Determination of lead(II)and cadmium(II)in hard and soft wheat by derivative potentiometric stripping analysis.AnalChim Acta,2000,409(1-2):93
[4]J Wang,J Lu,S B Hocevar et al.Bismuth-Coated Carbon Electrodes for Anodic Stripping Voltammetry.AnalChem,2000,72(14):3218.