کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
745032 1462106 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical determination of nicotinamide adenine dinucleotide and hydrogen peroxide based on poly(xanthurenic acid), flavin adenine dinucleotide and functionalized multi-walled carbon nanotubes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Electrochemical determination of nicotinamide adenine dinucleotide and hydrogen peroxide based on poly(xanthurenic acid), flavin adenine dinucleotide and functionalized multi-walled carbon nanotubes
چکیده انگلیسی

A bifunctional sensor for determination of reduced β-nicotinamide adenine dinucleotide (NADH) and hydrogen peroxide (H2O2) has been successfully fabricated by xanthurenic acid (Xa), flavin adenine dinucleotide (FAD), and functionalized carbon nanotubes (CNTs). The hybrid composites can be easily prepared by the electrocodeposition of polyXa/FAD and the adsorption of functionalized CNTs. These composites can be constructed of “polyXa/FAD/CNTs” and “CNTs/polyXa/FAD” according to the immobilization order of polyXa/FAD “before” and “after” the adsorption of CNTs. They are surface-confined and stable in various scan rates and different pH conditions. Particularly, the polyXa/FAD/MWCNTs show more efficient activity to target species due to the compact structure and more active surface area. It provides linear concentration range of 5 × 10−6–1.7 × 10−4 M and 1 × 10−4–2.9 × 10−3 M, with sensitivity of 155 μA mM−1 cm−2 and 60 μA mM−1 cm−2, and detection limit of 10−6 M and 10−4 M (S/N = 3) for NADH and H2O2, respectively. No interference except of the case for NADH determination in the presence of AA. It can be a good electrocatalyst to determine NADH and H2O2 and the linear sweep voltammetry (LSV) technique can help to analyze NADH from the AA interference.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 184, 31 July 2013, Pages 212–219
نویسندگان
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