A molecular imprinted fluorescence sensor based on EDTA-Cu quantum dots for methamphetamine recognition

Area of Science:

• Analytical Chemistry
• Materials Science
• Forensic Science

Background:

• Methamphetamine (METH) is a widely abused illicit stimulant with significant public health and law enforcement implications.
• Accurate and rapid detection methods for METH are crucial for combating drug abuse and ensuring public safety.
• Existing detection techniques may lack the speed, portability, or sensitivity required for on-site screening.

Purpose of the Study:

• To develop and validate a novel molecularly imprinted fluorescence sensor for the sensitive and selective detection of methamphetamine.
• To explore the utility of EDTA-Cu quantum dots (QDs) in constructing a robust platform for illicit drug quantification.
• To provide a portable and accurate tool for forensic investigations and real-time drug screening.

Main Methods:

• Construction of a molecularly imprinted polymer (MIP) sensor using EDTA-Cu quantum dots (EDTA-Cu QDs).
• Fluorescence spectroscopy was employed for the quantitative analysis of methamphetamine.
• Sensor performance was evaluated for linearity, limit of detection (LOD), and accuracy using real-world samples.

Main Results:

• The developed EDTA-Cu QDs-MIP sensor exhibited a linear response for methamphetamine detection in the range of 53 to 371 nM.
• A low limit of detection (LOD) of 20.6 nM was achieved using fluorescence spectroscopy.
• Validation with real-world samples demonstrated high accuracy, with recovery rates between 97.2% and 104.4%.

Conclusions:

• The study successfully demonstrates the first construction of an EDTA-Cu QDs-MIP fluorescence sensor for methamphetamine quantification.
• The developed sensor offers a sensitive, accurate, and portable platform suitable for forensic analysis and on-site illicit drug screening.
• This work expands the application of quantum dots in chemical sensing and provides a valuable tool for drug enforcement agencies.