Voltammetric determination of 1-naphthylacetic acid in soil samples using carbon nanotubes film modified electrode

被引：12
作者：
Lü, SF [1 ]
机构：
[1] Xiaogan Univ, Dept Chem, Hubei 432100, Peoples R China
来源：
ANALYTICAL LETTERS | 2003年 / 36卷 / 08期
关键词：
carbon nanotubes; 1-naphthylacetic acid; soil; modified electrode; COMMERCIAL FORMULATIONS; OXIDATION;
D O I：
10.1081/AL-120021534
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A multi-walled carbon nanotubes (MWNT) film coated glassy carbon electrode (GCE) was developed for the determination of 1-naphthylacetic acid in soil samples. 1-naphthylacetic acid (NAA) yields a well-defined oxidation peak whose potential is 1.03V (vs. SCE) at the MWNT-film modified GCE. MWNT-film on the GCE surface shows remarkable enhancement effect on the oxidation peak current of NAA. The experimental parameters were optimized and a direct electrochemical method for determining NAA was proposed. The oxidation peak current is proportional to the concentration of NAA over the range from I x 10(-8) to 2 x 10(-6) mol/L, and the detection limit is 2.5 x 10(-9) mol/L after 2 min accumulation. The relative standard deviation (RSD) of 5.1% for determination of I X 10(-7) mol/L NAA (n = 10) indicated excellent reproducibility. The MWNT-film modified GCE has been successfully applied to detect NAA in soil samples.
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收藏
页码：1523 / 1534
页数：12
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