کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10560541 | 969736 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The Ag+-G interaction inhibits the electrocatalytic oxidation of guanine - A novel mechanism for Ag+ detection
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The Ag+-G interaction inhibits the electrocatalytic oxidation of guanine - A novel mechanism for Ag+ detection The Ag+-G interaction inhibits the electrocatalytic oxidation of guanine - A novel mechanism for Ag+ detection](/preview/png/10560541.png)
چکیده انگلیسی
The heavy metal ions-nucleobases interaction is an important research topic in environmental and biochemical analysis. The presence of the silver ion (Ag+) may influence the formation of oxidation intermediate and the electrocatalytic oxidation activity of guanine (G), since Ag+ can interact with guanine at the binding sites which are involved in the electrocatalytic oxidation reaction of guanine. According to this principle, a new electrochemical sensor for indirectly detecting Ag+ based on the interaction of Ag+ with isolated guanine base using differential pulse voltammetry (DPV) was constructed. Among the heavy metal ions examined, only Ag+ showed the strongest inhibitory effect on the electrocatalytic oxidation of guanine at the multi-walled carbon nanotubes modified glassy carbon electrode (CNTs/GC). And the quantitative study of Ag+ based on Ag+-G sensing system gave a linear range from 100 nM to 2.5 μM with a detection limit of 30 nM. In addition, this modified electrode had very good reproducibility and stability. The developed electrochemical method is an ideal tool for Ag+ detection with some merits including remarkable simplicity, low-cost, and no requirement for probe preparation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 85, Issue 3, 15 September 2011, Pages 1603-1608
Journal: Talanta - Volume 85, Issue 3, 15 September 2011, Pages 1603-1608
نویسندگان
Xingxing Liu, Wang Li, Qinpeng Shen, Zhou Nie, Manli Guo, Yitao Han, Wei Liu, Shouzhuo Yao,