کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7585038 | 1492032 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Gold-nanoparticle-based fluorescent “turn-on” sensor for selective and sensitive detection of dimethoate
ترجمه فارسی عنوان
فلوئورسانس مبتنی بر نانوذرات طلا؟ سنسور برای تشخیص انتخابی و حساس دیمتوات
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A simple approach to fabricate a highly selective and sensitive dimethoate probe was developed based on Rhodamine B (RB)-functionalized gold nanoparticles (AuNPs). The quenching of RB fluorescence in the presence of AuNPs in the solution, mediated by fluorescence resonance energy transfer, was observed. In the presence of dimethoate, the fluorescence intensity of the RB-AuNP solution is gradually recovered when dimethoate molecules displace RB molecules on the surface of the AuNPs, which significantly increased the fluorescence intensity of RB. Fluorescence is proportional to the dimethoate concentration in the range of 0.005-1.0â¯ppm (R2â¯=â¯0.989), and the LOD was 0.004â¯ppm. The recoveries of dimethoate in water and fruit samples were 86-116% with a good RSD (<â¯9.3%). Because of its high sensitivity, excellent selectivity, and convenient fabrication process, this method is a promising candidate for dimethoate screening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 260, 15 September 2018, Pages 61-65
Journal: Food Chemistry - Volume 260, 15 September 2018, Pages 61-65
نویسندگان
Shih-Hsuan Hung, Jan-Yee Lee, Cho-Chun Hu, Tai-Chia Chiu,