BACKGROUND: Radon, the most common natural radioactive gas in the environment, is widely regarded as the second leading cause of lung cancer after smoking. However, conventional measurement techniques for radon concentration analysis are relatively lengthy and susceptible to interference from other environmental factors. Therefore, it is necessary to develop innovative and sustainable methods for the accurate and rapid analysis of radon concentrations, which has notable importance in the field of public health. RESULTS: Herein, we report a luminol electrochemiluminescence (ECL) gel device for the accurate and rapid determination of trace radon, with the lowest limit of detection (LOD) and the shortest pretreatment time among known detection methods. This ECL gel device is prepared by incorporating luminol as the ECL emitter. The reactive oxygen species produced by radon can serve as a coreactant reagent to enhance the ECL signal of luminol. The device enables the rapid identification of radon concentrations of <
2000 Bq/m SIGNIFICANCE: This ECL gel can be considered an environmentally friendly device because of its avoiding of additional coreactant reagent and electrolytes. This study enables direct ECL measurement of radon and fabricates an efficient device for accurate and rapid radon determination, which is of importance in the field of environment.