基于Tb掺杂Y2O3催化发光的有机胺气体传感研究OA

Amines,as volatile organic compounds(VOCs),are common harmful substances in meat and pose a threat to human health.In this study,a Tb-doped Y2O3 nanomaterial was synthesized,and a detection method for organic amine gases was developed based on the catalytic chemiluminescence sensing properties.Results showed that,compared to undoped Y2O3,the Tb-doped Y2O3 exhibited significantly enhanced response to amines.Optimization experiments indicated that the optimal sensing parameters were as follows:operating temperature of 200 ℃,detection wavelength of 555 nm,and carrier gas flow rate of 100 mL/min.Under these optimal conditions,the detection limit(3σ)for trimethylamine was 2.99 ppm,with the linear range was 20～500 ppm,the correlation coefficient of 0.992,and recovery rates ranging from 97.05%to 103.01%.The developed Tb-doped Y2O3 sensor was successfully applied to monitor organic amines released during meat spoilage.It was found that the meat did not show obvious spoilage within the first 10 hours at room temperature,but entered a rapid spoilage stage after 24 hours.This study demonstrates that the Tb-doped Y2O3 sensor holds great potential in monitoring meat freshness.