کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6662242 | 1426567 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultra-trace determination of silver using lead nanoparticles-modified thiol functionalized polysiloxane film glassy carbon electrode
ترجمه فارسی عنوان
تعیین فوق العاده ردیابی نقره با استفاده از نانو ذرات سرب-اصلاح شده تیول عامل پلی سیلوکسان الکترودهای کربن شیشه ای
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
A glassy carbon electrode covered with thiol-functionalized polysiloxane film modified by electrodeposited lead nanoparticles was used for determination of Ag(I) by square-wave anodic stripping voltammetry. The sol-gel methodology based on co-condensation of tetraethoxysilane (TEOS) and 3-mercaptopropyltrimethoxysilane (MPTMS) in the presence of cetyltrimethylammonium bromide (CTAB) was applied to synthesize an organosilica sol that was used to modify electrode surface. Silver ions were accumulated on the electrode surface by complexation with thiol groups and then simultaneously deposited with Pb nanoparticles by reduction at â 0.85 V. The Pb nanoparticles used as modifier of polyslioxane film significantly improved the electrochemical performance of the sensor. Under optimized conditions, the voltammetric signal was proportional to the Ag(I) concentration in the range of 0.0093 to 1.85 nmol Lâ 1 with excellent limits of detection and quantification of 1.2 pmol Lâ 1 and 4.1 pmol Lâ 1 after 90 s of accumulation on the electrode surface covered with thiol-functionalized polysiloxane film, respectively. The proposed method was applied for determination of Ag(I) in river water samples collected from Bystrzyca and Vistula without mineralization and a total silver concentration in commercially available silver-containing products.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 808, 1 January 2018, Pages 204-210
Journal: Journal of Electroanalytical Chemistry - Volume 808, 1 January 2018, Pages 204-210
نویسندگان
Ilona Sadok, Katarzyna Tyszczuk-Rotko,