FLOW-INJECTION AMPEROMETRIC DETECTION OF ANILINE WITH A PEROXIDASE MODIFIED CARBON-PASTE ELECTRODE

被引：13
|
作者：
DOMINGUEZSANCHEZ, P [1 ]
OSULLIVAN, CK [1 ]
MIRANDAORDIERES, AJ [1 ]
TUNONBLANCO, P [1 ]
SMYTH, MR [1 ]
机构：
[1] DUBLIN CITY UNIV,SCH CHEM SCI,DUBLIN 9,IRELAND
来源：
ANALYTICA CHIMICA ACTA | 1994年 / 291卷 / 03期
关键词：
AMPEROMETRY; FLOW INJECTION; ANILINE; PEROXIDASE MODIFIED CARBON PASTE ELECTRODE;
D O I：
10.1016/0003-2670(94)80030-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A horseradish peroxidase modified carbon paste electrode, useful for the determination of aniline at low ppb levels, is described. The enzyme was dispersed in the carbon paste and immobilised on a Nafion membrane. Cyclic voltammetry and differential pulse polarography were used to characterise the enzymatic electrochemical process, and several reaction products were identified. The electrode has been utilised for the flow injection amperometric detection of aniline at potentials down to + 100 mV (Ag/AgCl), giving fast responses (t < 30 s), a measurement precision of 0.75% R.S.D. (n = 8) and a sampling frequency of 20 h(-1). Application of the electrode to the analysis of aniline in spiked vegetable oil samples, using liquid-liquid extraction, resulted in a procedure giving no matrix interferences and a mean recovery of 99.4 +/- 3.2%.
引用
收藏
页码：349 / 356
页数：8
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