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Metronidazole Determination in Raw Milk with a Graphene Aerogel-Based Electrochemiluminescent Sensor and Its Effect on Cell Apoptosis

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Abstract

Herein an electrochemiluminescence (ECL) sensor based on graphene aerogel (GA) for detecting metronidazole (MTZ) was proposed. The ECL behavior of the Ru(bpy)32+-doped silica nanoparticles (SiO2@Ru(bpy)32+ NPs) was investigated with MTZ as the coreactant. Quantitative detection of MTZ was realized as MTZ could effectively enhance the ECL signal of the SiO2@Ru(bpy)32+ NPs. A wide linear range of 2.5 to 250 μM (r = 0.9937) was obtained under optimized conditions, and a detection limit (S/N = 3) was achieved as low as 0.5 μM. Finally, the analytical application of the proposed sensor was evaluated by detecting a drug sample and MTZ residues in raw milk. Additionally, MTZ was an apoptosis inducer toward MCF-7 cells, and our method could measure the accurate concentration of MTZ which can cause serious apoptosis in cellular experiments. Thus, with good stability, acceptable precision, and reproducibility, the proposed sensor supports promising practicability in clinical analysis.

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Funding

This research is supported by Anhui Provincial Natural Science Foundation (Grants No. 2008085QB68 and No. 1808085QB50), Natural Science Foundation of Anhui Provincial Department of Education (No. KJ2019A0598), Excellent Young Talents Fund Program of Higher Education Institutions of Anhui Province (No. gxyq2019168), Foundation of State Key Laboratory of Analytical Chemistry for Life Science (Grants No. SKLACLS2003), and Foundation of Henan Key Laboratory of Biomolecular Recognition and Sensing (Grants No. HKLBRSK1905).

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Correspondence to Gen Liu.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Gen Liu declares that she has no conflict of interest. Hui Gao declares that she has no conflict of interest. Jiajia Chen declares that she has no conflict of interest. Congying Shao declares that she has no conflict of interest. Peilong Wang declares that she has no conflict of interest.

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Liu, G., Gao, H., Chen, J. et al. Metronidazole Determination in Raw Milk with a Graphene Aerogel-Based Electrochemiluminescent Sensor and Its Effect on Cell Apoptosis. Food Anal. Methods 14, 1415–1424 (2021). https://doi.org/10.1007/s12161-021-01982-w

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  • DOI: https://doi.org/10.1007/s12161-021-01982-w

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