Direct ECL Detection of Fentanyl Drug with Bare Screen-Printed Electrodes

Area of Science:

• Analytical Chemistry
• Electrochemistry
• Luminescence

Background:

• Electrogenerated chemiluminescence (ECL) is a sensitive analytical technique.
• Fentanyl detection is crucial for forensic and clinical applications.
• Existing methods may require complex instrumentation or electrode modification.

Purpose of the Study:

• To develop a direct ECL-based method for fentanyl detection.
• To utilize unmodified screen-printed electrodes for simplicity and cost-effectiveness.
• To optimize experimental parameters for enhanced ECL response.

Main Methods:

• Direct ECL detection of fentanyl using tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)32+) as luminophore and fentanyl as co-reactant.
• Optimization of buffer pH, luminophore concentration, and electrode material (bare gold screen-printed electrodes).
• Analysis of fentanyl concentration using linear response and limit of detection.

Main Results:

• Optimal conditions: PBS buffer pH 6, 2.5 × 10-3 M Ru(bpy)32+, bare gold screen-printed electrodes.
• Linear response to fentanyl from 1 × 10-7 to 1 × 10-5 M.
• Limit of detection achieved at 6.7 × 10-8 M.

Conclusions:

• The proposed ECL method is rapid, sensitive, and cost-effective for fentanyl detection.
• It eliminates the need for electrode modification, sample pretreatment, or complex instrumentation.
• The method offers a robust and stable alternative for opioid screening in forensic and clinical applications.