ELECTROCHEMICAL PRETREATMENT OF CARBON-FIBER MICROELECTRODES FOR THE DETERMINATION OF FOLIC-ACID

被引：40
作者：
OSHEA, TJ
GARCIA, AC
BLANCO, PT
SMYTH, MR
机构：
[1] UNIV OVIEDO,DEPT PHYS & ANALYT CHEM,ASTURIAS,SPAIN
[2] DUBLIN CITY UNIV,SCH CHEM SCI,DUBLIN 9,IRELAND
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1991年 / 307卷 / 1-2期
关键词：
D O I：
10.1016/0022-0728(91)85539-2
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An electrochemical pretreatment regime was optimised for the determination of folic acid at cylindrical carbon fibre microelectrodes. The effects of pretreatment on the functional characteristics of the microelectrode were examined. The pretreated electrode gave rise to higher faradaic and capacitive currents, presumably due to the presence of new surface functionalities. Differential pulse voltammograms of folic acid recorded in 0.1 M perchloric acid at the activated electrode exhibited a very well defined reduction peak resulting in a detection limit of 1 x 10(-8) M with a linear range of 2 x 10(-8) M to 1 x 10(-6) M folic acid.
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页码：63 / 71
页数：9
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