کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7150109 | 1462120 | 2012 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Potentiometric determination of nanomolar concentration of Cu (II) using a carbon paste electrode modified by a self-assembled mercapto compound on gold nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A mercapto compound of bis [o-(N-methylidenamino-2-thiol-1,3,4-thiadiazole-5-yl) phenoxy] ethane (BMTTE) self-assembled on gold nanoparticles, was used as modifier to construct a chemically modified carbon paste electrode. The prepared electrode exhibit a Nernstian slope of 29.3 ± 0.2 mV/decade towards Cu (II) ion over a wide concentration range of 4.0 Ã 10â9 to 2.2 Ã 10â3 mol Lâ1. The limit of detection of the electrode was found 1.6 Ã 10â9 mol Lâ1. The potentiometric response of the electrode based on BMTTE is independent of pH of test solution in the pH range of 4.0-9.0 with a response time of 15 s. The proposed sensor shows fairly good discriminating ability towards Cu2+ ion in comparison with many hard and soft metal ions. Finally, the proposed electrode was successfully used as an indicator electrode in potentiometric titration of copper ion with EDTA and in direct determination of copper (II) ion in some water samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 169, 5 July 2012, Pages 305-311
Journal: Sensors and Actuators B: Chemical - Volume 169, 5 July 2012, Pages 305-311
نویسندگان
Mohammad Hossein Mashhadizadeh, Soleyman Ramezani, Sattar Ebrahimi,