Additively manufactured ready-to-use platform using conductive recycled PLA for ketamine sensing.
Mikrochimica acta January 9, 2025 Maria M C Souza, Raquel G Rocha, Gilvana P Siqueira et al. 12 citations
A 3D-printed electrode made from recycled plastic, graphite, and carbon black detects the drug ketamine in beverages faster and more sensitively than a commercial 3D-printed electrode. After a simple polishing step, the recycled-material electrode showed better electrical performance: a peak-to-peak separation of 130 mV versus 759 mV, lower charge transfer resistance (1.04 kΩ vs. 9.62 kΩ), and a higher heterogeneous rate constant. It detected ketamine across a concentration range of 10 to 250 μmol L-1 with a sensitivity of 0.024 μA μmol L-1 and a detection limit of 0.7 μmol L-1. Recovery rates in spiked drinks (wine, beer, water, vodka) ranged from 82% to 115%.