کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7640161 | 1494853 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A traffic light-type sensitive visual detection of mercury by golden nanoclusters mixed with fluorescein
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A novel colorimetric sensor based on red-emitting bovine serum albuminâgolden nanoclusters (BSA-AuNCs) and green-colored fluorescein that exhibited traffic light-type color change was developed for ratiometric and visual detection of mercury (Hg). In the presence of Hg2+, the red fluorescence from BSA-AuNCs was quenched while the green fluorescein was inert thus as a reference. And it presented traffic light-type (red, yellow and green) color in the low, middle and high concentration of Hg2+. A potential mechanism was investigated by Energy Dispersive Spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The selective quenching mechanism may be due to the formation of gold amalgam bonds between BSA-AuNCs and Hg2+. A linear correlation was constructed for Hg2+ in the concentration range of 10-500â¯Î¼gâ¯Lâ1. A limit of detection (LOD) of 7.4â¯Î¼gâ¯Lâ1 and a relative standard deviation (RSD, nâ¯=â¯7) of 0.4% were obtained, which can be used to monitor the concentration of Hg2+. In visual detection, as low as 0.1â¯Î¼gâ¯mLâ1 of Hg2+ can be easily discriminated from the blank with the naked eye. The proposed method was validated by analysis of certified environment and food samples with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 141, September 2018, Pages 163-169
Journal: Microchemical Journal - Volume 141, September 2018, Pages 163-169
نویسندگان
Wenqing Deng, Rui Dai, Pingyue Hu, Qianqian Li, Xiaoli Xiong, Ke Huang, Feng Huo,