Citation: YAN Zheng-Yu, ZHAO Na, LIU Zhen, LÜ Hua, CHEN Jian-Qiu. Biomass-Based Carbon Dots:Synthesis and Application in Oxytetracycline Hydrochloride Determination[J]. Chinese Journal of Inorganic Chemistry, ;2014, 30(4): 937-944. doi: 10.11862/CJIC.2014.097
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Carbon dots (CDs) were prepared via a simple chemical oxidation route using activated carbon as the carbon precursor and a mixture of hydrogen peroxide and acetic acid as the oxidant. The obtained CDs were further purified by diethyl ether and passivated by polyethylene glycol 2000 (PEG2000). When excited at 316 nm, the maximum emission wavelength of the CDs is about 435 nm, with a quantum yield of 19.6%. Based on fluorescence quenching, a novel method for assay of oxytetracycline hydrochloride (OTC) was developed with PEG2000-passivated CDs. Alinear relationship between the change of fluorescence intensity and the concentration of OTC (1.66~49.69 μg·mL-1) was obtained with a relation coefficient of 0.9986. The recovery was in the range of 98.0% to 102.0% with a relative standard deviation of 1.7%, and the limit of detection was 1.4×10-3 μg·mL-1.
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