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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
High sensitive determination of theophylline based on gold nanoparticles/l-cysteine/Graphene/Nafion modified electrode
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
نویسندگان
, , , , ,