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	The electrochemical behavior of iron(III) incorporated in zeolite Y-modified electrode and the catalytic oxidation of ascorbic acid
	Jiang, Y. X. ; Zou, M. Z. ; Yuan, K. ; Xu, H. D. ; Jiang YX(姜艳霞)
	1999
关键词	Fe3+Y/zeolite-modified electrode ascorbic acid urine fruits
英文摘要	A new method is developed for the catalytic oxidation of ascorbic acid (AA) at a graphite-zeolite-modified electrode doped with iron(III) (Fe3+Y/ZCME), in which iron(III) exchanged in zeolite Y can act as catalyst to oxidize PLA. First, the electrochemical behavior of iron(III) incorporated in the zeolite Y-modified electrode was studied. The results illustrate that diffusion controls the ferric/ferrous redox process at the Fe3+Y/ZCME. The anodic current of this process increases with the supporting electrolyte concentration of non-size-excluded cation and was suppressed when using size-excluded cation. Second, the catalytic oxidation of AA was explored at Fe3+Y/ZCME. With constant potential amperometric measurements optimal conditions for AA determination were obtained. The working potential was 0.55 V (vs. SCE); the supporting electrolyte was 0.1 M KNO3 or 0.05 M Na2HPO4-KH2PO4 buffer solution (pH 6.8). The response current exhibits a linear relationship with the concentration of AA over the range of 1.58 x 10(-6)-2.15 x 10(-2) M. When samples of urine, and fruit were analyzed with Fe3+Y/ZCME, we obtained AA recovery of 98-102%, and a relative standard deviation lower than 3%. Meanwhile, interferences from other ions and organic substances were examined.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/61670]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Jiang, Y. X.,Zou, M. Z.,Yuan, K.,et al. The electrochemical behavior of iron(III) incorporated in zeolite Y-modified electrode and the catalytic oxidation of ascorbic acid[J],1999.
APA	Jiang, Y. X.,Zou, M. Z.,Yuan, K.,Xu, H. D.,&姜艳霞.(1999).The electrochemical behavior of iron(III) incorporated in zeolite Y-modified electrode and the catalytic oxidation of ascorbic acid..
MLA	Jiang, Y. X.,et al."The electrochemical behavior of iron(III) incorporated in zeolite Y-modified electrode and the catalytic oxidation of ascorbic acid".(1999).

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