研究目的
To develop a rapid, selective, and sensitive screening method for the detection of trace fluoroquinolone (FQ) residues in milk using lanthanide coordination polymer nanomaterials.
研究成果
The developed method based on AMP/Tb CPNSs offers a rapid, direct, and sensitive approach for the detection of FQ residues in milk, with simple sample pretreatment and excellent selectivity. It represents a novel application of lanthanide coordination polymer nanomaterials in food safety monitoring.
研究不足
The method's performance is influenced by the pH of the reaction medium and the presence of electron-donating or electron-accepting groups on the FQ structure. The steric hindrance effect of the piperazine ring at the 7-position of the FQ may also restrict conjugation with AMP/Tb CPNSs.
1：Experimental Design and Method Selection:
The study utilized lanthanide coordination polymer nanosheets (CPNSs) composed of adenosine monophosphate (AMP) and terbium (Tb3+) ions for the detection of FQs. The interaction mechanisms were investigated using TEM, FTIR spectroscopy, and fluorescence spectroscopy.
2：Sample Selection and Data Sources:
Milk samples were used to evaluate the method's applicability. FQs at various concentrations were added to AMP/Tb solutions to measure fluorescence responses.
3：List of Experimental Equipment and Materials:
Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and fluorescence spectroscopy were used for characterization. AMP and Tb3+ were used to prepare CPNSs.
4：Experimental Procedures and Operational Workflow:
CPNSs were prepared by mixing Tb3+ and AMP solutions. The fluorescence intensity was measured at 545 nm upon addition of FQs under optimized conditions.
5：Data Analysis Methods:
The fluorescence intensity was analyzed to establish a linear relationship with FQ concentrations. Precision and stability were assessed through intraday and interday recovery tests.
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