کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1241693 1495775 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A highly selective and sensitive nanosensor for the detection of glyphosate
ترجمه فارسی عنوان
یک نانوسنسور بسیار انتخابی و حساس برای تشخیص گلیفواسات
کلمات کلیدی
نانوسنسور، نانولوله کربنی، کاتالیزور مانند پراکسیداز، گلیفوزات
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی

●A turn-off fluorescence sensor synthesized by combining copper (II) oxide and multiwall carbon nanotubes (MWCNTs) were used for measuring glyphosate based on the inhibiting the catalytic activity of the CuO/MWCNTs.●The results indicated that this sensor is not only highly sensitive, with a detection limit of 0.67 ppb and a linear range from 0.002 to 0.01 ppm, but also exhibits good selectivity for glyphosate.●We investigated the interference of this sensor and demonstrated the feasibility of using the method used in the analysis of real samples.

A turn-off fluorescence sensor synthesized by combining copper (II) oxide and multiwall carbon nanotubes (MWCNTs) were used for measuring glyphosate based on the inhibiting the catalytic activity of the CuO/MWCNTs. This sensor was synthesized by precipitating copper ions onto the acidic MWCNTs under basic conditions; the resulting material was characterized by the transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy to confirm its structure. The CuO/MWCNTs nanomaterial was found to exhibit high peroxidase-like catalytic activity toward the reduction of H2O2 to H2O and the oxidation of Amplex Red to resorufin, with a corresponding color change from pink to red and the fluorescence enhancement. However, this activity was inhibited and the fluorescence diminished when glyphosate was added to the system. Using this strategy, we applied this sensor to detect glyphosate. The results indicated that this sensor is not only highly sensitive, with a detection limit of 0.67 ppb and a linear range from 0.002 to 0.01 ppm, but also exhibits good selectivity for glyphosate. When this sensor was assessed for detecting glyphosate in real water samples, recoveries of 96–107% were attained. This proposed material and method are a promising approach for rapid screening of glyphosate.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 161, 1 December 2016, Pages 94–98
نویسندگان
, , , , ,