کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
188338 | 459658 | 2012 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High sensitive determination of theophylline based on gold nanoparticles/l-cysteine/Graphene/Nafion modified electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
In the work described on this paper, a gold nanoparticles (GNP)/l-cysteine (l-cys)/Graphene (Gr)/Nafion composite film modified glass carbon electrode (GCE) was fabricated and characterized. The modified electrode showed excellent electrocatalytic activity towards the oxidation of theophylline (TP) in 0.1 mol L−1 H2SO4 medium. Differential pulse voltammetry (DPV) was used for the determination of TP. Under the optimum conditions, the peak current of TP was proportional to its concentration at the range of 4.0 × 10−9 to 6.0 × 10−5 mol L−1 with a detection limit 4.0 × 10−10 mol L−1. The newly developed method was successfully applied for the determination of TP in tea samples and pharmaceutical tablets with good percentage of recoveries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 78, 1 September 2012, Pages 434–439
Journal: Electrochimica Acta - Volume 78, 1 September 2012, Pages 434–439
نویسندگان
Lijuan Zi, Jianjun Li, Yexuan Mao, Ran Yang, Lingbo Qu,