An integrated electrochemiluminescence microfluidic device for detecting ultra-low concentration of ceftriaxone.

Biosens Bioelectron

School of Life and Environmental Sciences, Guangxi Colleges and Universities Key Laboratory of Biomedical Sensors and Intelligent Instruments, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, PR China; College of Electronic Engineering and Automation, Guangxi Key Laboratory of Au

Published: November 2025


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Article Abstract

Ceftriaxone sodium, a widely used third-generation cephalosporin antibiotic, poses significant health risks when residues accumulate in clinical or environmental settings. However, conventional detection techniques, including high-performance liquid chromatography and capillary electrophoresis, are limited by complex procedures, poor sensitivity, and a lack of real-time capability. To address these challenges, we report a sensitivity-enhanced electrochemiluminescence (ECL) microfluidic device for the rapid and label-free detection of ultra-low concentrations of ceftriaxone. Au(Capt) gold nanoclusters were served as a novel ECL luminophore to boost detection sensitivity, while a 3D-printed circulating microfluidic channel was designed to enrich ceftriaxone via inertial centrifugation. The device achieved a wide detection range of 4-400 μg/mL, a low detection limit of 0.522 μg/mL, and an average recovery of 99.1 % in real sample tests. This integrated platform offers a promising strategy for simple, sensitive, and on-site monitoring of ceftriaxone contamination.

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http://dx.doi.org/10.1016/j.bios.2025.117657DOI Listing

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