کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1163251 1490936 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fluorescent determination of graphene quantum dots in water samples
ترجمه فارسی عنوان
تعیین فلورسنت نقاط کوانتومی گرافن در نمونه های آب
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Development of a novel and simple method for determination of graphene quantum dots.
• Preconcentration of graphene quantum dots by solid phase extraction.
• Fluorescence spectroscopy allows fast measurements.
• High sensitivity and great reproducibility are achieved.

This work presents a simple, fast and sensitive method for the preconcentration and quantification of graphene quantum dots (GQDs) in aqueous samples. GQDs are considered an object of analysis (analyte) not an analytical tool which is the most frequent situation in Analytical Nanoscience and Nanotechnology. This approach is based on the preconcentration of graphene quantum dots on an anion exchange sorbent by solid phase extraction and their subsequent elution prior fluorimetric analysis of the solution containing graphene quantum dots. Parameters of the extraction procedure such as sample volume, type of solvent, sample pH, sample flow rate and elution conditions were investigated in order to achieve extraction efficiency. The limits of detection and quantification were 7.5 μg L−1 and 25 μg L−1, respectively. The precision for 200 μg L−1, expressed as %RSD, was 2.8%. Recoveries percentages between 86.9 and 103.9% were obtained for two different concentration levels. Interferences from other nanoparticles were studied and no significant changes were observed at the concentration levels tested. Consequently, the optimized procedure has great potential to be applied to the determination of graphene quantum dots at trace levels in drinking and environmental waters.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 896, 8 October 2015, Pages 78–84
نویسندگان
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