Determination of trace hydrogen sulfide by using the permanganate induced chemiluminescence of carbon dots

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• 作者：Bibi Liu ; Suqin Han
• 关键词：Flow injection ; Glucose ; Environmental analysis ; Water analysis ; TEM ; Mechanism
• 刊名：Microchimica Acta
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：183
• 期：11
• 页码：3087-3092
• 全文大小：455 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073
• 卷排序：183

文摘

Carbon dots (C-dots) were prepared in aqueous solution by a one-step ultrasonic approach, and the absorption and fluorescence spectra were acquired. It is found that acidic solutions of potassium permanganate cause C-dots to produce green and red chemiluminescence (CL) peaking at 520 nm and 620 nm, respectively, and that CL intensity is further enhanced on addition of sulfide. A mechanism leading to this enhancement is suggested. After optimizing the reaction conditions, the CL-based calibration plot is linear in the 1.0 to 100 μM sulfide concentration range, with a 0.2 μM detection limit (at a signal-to-noise ratio of 3). The relative standard deviation is 1.7 % for the determination of a 10 μM solution of sulfide. The method was employed to quantify trace levels of sulfide in water samples.