期刊
MICROCHIMICA ACTA
卷 183, 期 11, 页码 3087-3092出版社
SPRINGER WIEN
DOI: 10.1007/s00604-016-1957-6
关键词
Flow injection; Glucose; Environmental analysis; Water analysis; TEM; Mechanism
资金
- Natural Science Foundation of Shanxi [2013011013-3]
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 mu M sulfide concentration range, with a 0.2 mu M detection limit (at a signal-to-noise ratio of 3). The relative standard deviation is 1.7 % for the determination of a 10 mu M solution of sulfide. The method was employed to quantify trace levels of sulfide in water samples.
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