期刊
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
卷 114, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2022.104849
关键词
Cerium molybdate; Multi-walled carbon nanotubes; Molecularly imprinted sensors; Ponceau 4R; Ultrasensitive detection; Hybridized electrode
资金
- Special Project of 2022 Social Development and Transformation of Scientific and Technological Achievements [51318]
- Zhuzhou Municipal Science and Technology Bureau [44, 30]
- NSFC [61703152]
- Hunan Provincial Health Commission Foundation [202216005061]
- Hunan Provincial Natural Science Foundation [2018JJ34]
- Project of Science and Technology Department of Hunan Province [2021JJ50035, 2020JJ4149]
In this study, a pod-like Ce2Mo3O13 was prepared and used to construct a highly sensitive molecularly imprinted sensor for the detection of ponceau 4 R at nanomolar concentrations. The results showed that the electrochemical response of the MIPs/Ce2Mo3O13-MWCNTs/GCE hybridized electrode was stronger than the non-molecularly imprinted ones, indicating a synergistic effect from the combination of Ce2Mo3O13-MWCNTs and modification to the electrode.
The novel binary metal oxide cerium molybdate (Ce2Mo3O13) as a promising strategy can be combined with MWCNTs for the development of ultrasensitive sensors. Herein, a pod-like Ce2Mo3O13 was prepared, charac-terized, and used to construct a molecularly imprinted sensor (MIPs) for detection of ponceau 4 R as low as to nanomolar concentration. The results demonstrate that the electrochemical response at the specific hybridized electrode of MIPs/Ce2Mo3O13-MWCNTs/GCE is stronger than non-molecularly imprinted ones (NIPs). It in-dicates a synergistic effect resulting from the hybridized Ce2Mo3O13-MWCNTs combination and modification to the electrode. Under optimal conditions, the calibration curve is in the range of 10 nmol L-1 to 1 mu mol L-1, with a limit of detection of 7 nmol L-1 for ponceau 4 R determination. The excellent sensitivity, reproducibility, and selectivity of the new sensor provide an accurate and facile avenue for ultrasensitive ponceau 4 R detection in different samples.
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