کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8960535 1646409 2018 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A carbon dot-based fluorescence method for selective quantification of sulfide in environmental samples
ترجمه فارسی عنوان
یک روش فلورسانس مبتنی بر کربن برای اندازه گیری انتخابی سولفید در نمونه های محیطی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
With the rapid growth of agricultural and industrial sectors, a significant quantity of sulfide is released into water resources systems at an increasing rate. This has caused serious environmental problems, which calls for the development of sensitive and selective methods for determining sulfide in environmental samples. In this report, we employed carbon dots (C-dots) as fluorescence emitters and measured the decrease in their fluorescence intensity caused by Ag2S formation. Instead of having free Ag+ cation (which can interact with many other species besides sulfide) in the C-dot solution, we used iodide (I−) to convert Ag+ to one of the least soluble silver salts (i.e., AgI). While AgI interacts with sulfide to form Ag2S (because of the lower solubility of Ag2S), it remains stable against many other anions, thereby offering the method high selectivity. Under optimized experimental conditions, the developed method enabled quantifying sulfide in the range of 1-10 μM with the low detection limit of 0.48 μM. The applicability of the method was demonstrated by successful analysis of sulfide in a mineral water, a hot spring water, and an industrial wastewater sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 277, 20 December 2018, Pages 1-7
نویسندگان
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