کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10275992 | 463412 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct simultaneous determination of dihydroxybenzene isomers at C-nanotube-modified electrodes by derivative voltammetry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Direct simultaneous determination of dihydroxybenzene isomers at C-nanotube-modified electrodes by derivative voltammetry Direct simultaneous determination of dihydroxybenzene isomers at C-nanotube-modified electrodes by derivative voltammetry](/preview/png/10275992.png)
چکیده انگلیسی
The voltammetric behavior of dihydroxybenzene isomers was studied with glassy carbon electrodes modified with multi-wall carbon nanotubes. In 0.1 mol Lâ1 HAc + NaAc buffer solution (pH 5.5), the modified electrode showed a good electrocatalytic response towards dihydroxybenzenes. The peak currents increased significantly and their oxidation potentials shifted negatively. Through a derivative technique, the three oxidation peaks of dihydroxybenzene isomers can be separated, thus the method can be applied to direct simultaneous determination without previous separation. The linear calibration ranges were 2 Ã 10â6-1 Ã 10â4 mol Lâ1 for hydroquinone and catechol, respectively, and 5 Ã 10â6 to 8 Ã 10â5 mol Lâ1 for resorcinol, with detection limits of 6 Ã 10â7, 6 Ã 10â7 and 1 Ã 10â6 mol Lâ1, respectively. This method has been applied to the direct determination of dihydroxybenzene isomers in artificial wastewater, and the recovery was from 92% to 104%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 575, Issue 2, 1 February 2005, Pages 275-280
Journal: Journal of Electroanalytical Chemistry - Volume 575, Issue 2, 1 February 2005, Pages 275-280
نویسندگان
Ya-Ping Ding, Wei-Li Liu, Qing-Sheng Wu, Xiao-Gang Wang,