期刊
JOURNAL OF LUMINESCENCE
卷 161, 期 -, 页码 374-381出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2015.01.045
关键词
Perfluorooctanoic acid; CdS quantum dots; Fluorescence; Quenching
类别
资金
- National Natural Science Foundation of China [21107027, 21177044]
- Huazhong University of Science and Technology [2014QN109]
Analysis of perfluorooctanoic acid (PFOA) usually requires a combination of high-performance liquid chromatography and mass spectrometry, which is expensive and time-consuming. In the present work, water-soluble CdS quantum dots (QDs) were employed to develop a simple and rapid fluorometric method for the determination of PFOA. Strongly fluorescent CdS QDs were prepared by using 3-mercaptopropionic acid (MPA) as a stabilizer. It was observed that PFOA strongly quenched the fluorescence emission of the MPA-CdS QDs because PFOA promotes the aggregation of MPA-CdS QDs through a fluorine-fluorine affinity interaction. Under optimum conditions, the fluorescence intensity of MPA-CdS QDs was observed to decrease linearly with an increase in the concentration of PFOA from 0.5 to 40 mu mol L-1, with a limit of detection of 03 mu mol L-1. This new method was successfully implemented for the analysis of PFOA-spiked textile samples, with recoveries ranging from 95% to 113%. (C) 2015 Elsevier B.V. All rights reserved.
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