Determination of acetamiprid using electrochemiluminescent aptasensor modified by MoS2QDs-PATP/PTCA and NH2-UiO-66


A novel aptasensor has been fabricated based on the resonance energy transform (RET) system from MoS2QDs-PATP/PTCA (donor) to NH2-UiO-66 (acceptor). The electrochemiluminescence (ECL) signal of PTCA was greatly amplified due to the decoration of MoS2QDs-PATP, and the NH2-UiO-66 was utilized to label the signal probe DNA (pDNA), which hybridizes with the exposed aptamer anchored on the surface of MoS2QDs-PATP/PTCA. With the target acetamiprid, the specific binding of acetamiprid to aptamer causes the connection between the donor and the acceptor to be interrupted and produce an “on” ECL signal. Thus, an “off-on” ECL sensing platform for sensitive and selective acetamiprid assay was designed. Under the optimal condition, the ECL signal of the aptasensor was found to be linearly related to the logarithm of the acetamiprid concentration ranging from 0.1 fM to 0.1 μM with a detection limit of 0.064 fM. More importantly, the recovery rate of the ECL aptasensor was calculated to be 98.7 ~ 106% with a RSD lower 5.1% for the residual acetamiprid assay in real food samples, which indicated that the aptasensor has high potential for practical applications.

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This work was financially supported by the Natural Science Foundation of Jiangsu Province (BK20190928), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJB150003), the National Natural Science Foundation of China (51874050, 21904014), the Foundation of Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology (BM2012110), and the Foundation of the Science and Technology Bureau of Changzhou province (CQ20204033).

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Li, J., Jiang, D., Shan, X. et al. Determination of acetamiprid using electrochemiluminescent aptasensor modified by MoS2QDs-PATP/PTCA and NH2-UiO-66. Microchim Acta 188, 44 (2021).

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  • Resonance energy transfer
  • Electrochemiluminescence aptasensor
  • Acetamiprid
  • NH2-UiO-66