Rapid Colorimetric Detection of Cartap Residues by AgNP Sensor with Magnetic Molecularly Imprinted Microspheres as Recognition Elements
Abstract
:1. Introduction
2. Results and Discussion
2.1. Preparation of Fe3O4@mSiO2@MIPs
2.2. Characterization of Fe3O4@mSiO2@MIPs
2.3. Adsorption Characteristics
2.4. Evaluation of Selectivity for Recognition
2.5. Reusability of Fe3O4@mSiO2@MIPs
2.6. Selective Enrichment of Cartap from Spiked Tea Beverages
2.7. Colorimetric and UV-Vis Spectroscopic Determination of Cartap
3. Materials and Methods
3.1. Chemicals and Reagents
3.2. Apparatus and Conditions
3.3. Preparation of Fe3O4@mSiO2@MIPs
3.4. Adsorption Experiments
3.5. Regeneration and Reused Experiments
3.6. Selective Recognition of Cartap from Tea Beverages by Fe3O4@mSiO2@MIPs
3.7. Colorimetric, UV-Vis Spectroscopic and HPLC Determination of Cartap
3.8. Statistical Analyses
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample Availability: Samples of the compounds are available from the authors. |
Samples * | AgNP Colorimetric Detection after Fe3O4@mSiO2@MIPs-Pretreatment | HPLC Analysis |
---|---|---|
Green tea (mg/kg) | 10.112 ± 0.202 a | 10.084 ± 0.307 a |
Black tea (mg/kg) | 9.798 ± 0.219 a | 9.831 ± 0.196 a |
White tea (mg/kg) | 9.965 ± 0.199 a | 10.022 ± 0.287 a |
Yellow tea (mg/kg) | 9.767 ± 0.235 b | 9.779 ± 0.109 b |
Dark tea (mg/kg) | 10.033 ± 0.201 a | 9.974 ± 0.214 a |
Oolong tea (mg/kg) | 10.042 ± 0.318 b | 10.013 ± 0.226 b |
Bottled green tea (mg/L) | 4.027 ± 0.082 a | 4.008 ± 0.105 a |
Bottled iced black tea (mg/L) | 3.985 ± 0.095 a | 4.015 ± 0.083 a |
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Wu, M.; Deng, H.; Fan, Y.; Hu, Y.; Guo, Y.; Xie, L. Rapid Colorimetric Detection of Cartap Residues by AgNP Sensor with Magnetic Molecularly Imprinted Microspheres as Recognition Elements. Molecules 2018, 23, 1443. https://doi.org/10.3390/molecules23061443
Wu M, Deng H, Fan Y, Hu Y, Guo Y, Xie L. Rapid Colorimetric Detection of Cartap Residues by AgNP Sensor with Magnetic Molecularly Imprinted Microspheres as Recognition Elements. Molecules. 2018; 23(6):1443. https://doi.org/10.3390/molecules23061443
Chicago/Turabian StyleWu, Mao, Huiyun Deng, Yajun Fan, Yunchu Hu, Yaping Guo, and Lianwu Xie. 2018. "Rapid Colorimetric Detection of Cartap Residues by AgNP Sensor with Magnetic Molecularly Imprinted Microspheres as Recognition Elements" Molecules 23, no. 6: 1443. https://doi.org/10.3390/molecules23061443