کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7147927 | 1462099 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Voltammetric studies of kaempferol on polyvinyl pyrrolidone cladding quantum dots CdS doped carbon paste electrode and analytical application
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A facile and highly sensitive electrochemical sensor for kaempferol was fabricated by doping polyvinyl pyrrolidone cladding quantum dots to the carbon paste electrode. The quantum dots were characterized with transmission electron microscopy, ultraviolet spectrum and infrared spectrum. The electrochemical behaviors and kinetic parameters of kaempferol were investigated on the sensor by cyclic voltammetry and chronocoulometry in NaAc-HAc (pH 4.4). The proposed sensor accelerated the redox processes of kaempferol obviously, and the oxidation currents were linearly relationship with kaempferol in two concentration intervals: one was 6.0Â ÃÂ 10â8-2Â ÃÂ 10â6Â mol/L and the other was 5.0Â ÃÂ 10â6-2.5Â ÃÂ 10â5Â mol/L. The quantification limit obtained by square wave voltammetry was 6.0Â ÃÂ 10â8Â mol/L. Merits such as extreme simplicity, low cost, good sensitivity, high sensitivity, good stability and reproducibility made it an excellent electrochemical sensor for kaempferol. A new electroanalytical method for kaempferol was proposed and used for determination of kaempferol in tablets with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 191, February 2014, Pages 673-680
Journal: Sensors and Actuators B: Chemical - Volume 191, February 2014, Pages 673-680
نویسندگان
Kai Zhang, Ge Song, Yinfeng Li, Xianli Wu, Kunjing Li, Baoxian Ye,