An Accessible Yarn-Based Sensor for In-Field Detection of Succinylcholine Poisoning

Succinylcholine (SUX) is a clinical anesthetic that induces temporary paralysis and degraded by endogenous enzymes within the body. In high doses without respiratory support, it results in rapid untraceable death asphyxiation. A potentiometric thread-based method was developed for in-field detection of SUX forensic use. We fabricated first solid-contact ion-selective electrodes from cotton yarn, carbon black ink, polymeric membrane. The could selectively measure linear range 1 mM to 4.3 μM urine, with Nernstian slope 27.6 mV/decade. Our compact portable yarn-based sensors achieved 94.1% recovery at low concentrations, demonstrating feasibility real-world applications. While other challenges remain, development electrode shows possible detect this poison urine paves way low-cost, diagnostic devices.