کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10559741 | 969670 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bilayer lipid membrane biosensor with enhanced stability for amperometric determination of hydrogen peroxide
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
In this paper, a polydopamine (PDA) film is electropolymerized on the surface of bilayer lipid membrane (BLM) which is immobilized with horseradish peroxidase (HRP). The coverage of the PDA film on HRP/BLM electrode is monitored by electrochemical impedance spectroscopy (EIS). The electrocatalytic reduction of H2O2 at the PDA/HRP/BLM electrode is studied by means of cyclic voltammetry (CV). The biosensor has a fast response to H2O2 of less than 5 s and an excellent linear relationship is obtained in the concentration range from 2.5 Ã 10â7 to 3.1 Ã 10â3 mol Lâ1, with a detection limit of 1.0 Ã 10â7 mol Lâ1 (S/N = 3). The response current of BLM/HRP/PDA biosensor retains 84% of its original response after being stored in 0.1 mol Lâ1 pH 7.0 PBS at 4 °C for 3 weeks. The selectivity, repeatability, and storage stability of PDA/HRP/BLM biosensor are greatly enhanced by the coverage of polydopamine film on BLM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 85, Issue 1, 15 July 2011, Pages 43-48
Journal: Talanta - Volume 85, Issue 1, 15 July 2011, Pages 43-48
نویسندگان
Longzhen Zheng, Leyan Xiong, Dan Zheng, Yindi Li, Qiang Liu, Kui Han, Wen Liu, Kun Tao, Shaoming Yang, Jian Xia,