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 shu

Biomass-Based Carbon Dots：Synthesis and Application in Oxytetracycline Hydrochloride Determination

YAN Zheng-Yu ^1,2 ,
ZHAO Na ^1,2 ,
LIU Zhen ^1,2 ,
LÜ Hua ^1,2 ,
CHEN Jian-Qiu ^1,2,,

1.
1 State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China;

Corresponding author: CHEN Jian-Qiu,
Received Date: 27 August 2013
Available Online: 23 November 2013
Fund Project: 江苏省环境工程重点实验室开放基金(No.KF2012008)；江苏省自然科学基金青年基金(No.BK20130646)；中央高校基本科研业务费专项资金(No.JKQZ2013009,No.JKPZ2013017)；中国药科大学大学生创新训练计划(No.02640556、JKY2011083)资助项目。 (No.KF2012008)；江苏省自然科学基金青年基金(No.BK20130646)；中央高校基本科研业务费专项资金(No.JKQZ2013009,No.JKPZ2013017)；中国药科大学大学生创新训练计划(No.02640556、JKY2011083)

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.
- carbon dots;polyethylene glycol 2000;oxytetracycline hydrochloride;fluorescence quenching
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