二氧化锡气体传感器快速检测挥发性有机化合物

Fast Detection of Volatile Organic Compounds With SnO_2 Gas Sensor

论述了将SnO2气体传感器作为便携式气相色谱检测器,重点是挥发有机化合物(VOCs)检测方法的可行性研究。SnO2气体传感器的动态范围103;最小检测浓度(苯)8.12×10-4g/L、面积重现性<6%,取得了较满意的结果。对SnO2气体检测器的加热电压、温度特性和快速检测指标作了基本分析和考察,最后将SnO2气体传感器和FID检测器进行了初步比较。实验表明,将其作为专用便携色谱检测器,可以基本满足快速分析应用的要求。

In this study, the SnO2 gas sensor was used as the gas chromatography detector and emphasized on the feasibility of the approach for fast detection of vohatile organic compounds （VOCs） in environment gas was studied and discussed. Examinations of effect of applied voltage on response and temperature characteristics of the SnO2 gas sensor have been done. On combination of the gas sensor with a capillary GC column calibration curve was linear in the range of 10^3, minimum detectable concentration was 8.12 × 10^-4g/L （for benzene as example） , and reproducibility of peak area measured （RSD） was less than 6%. The final comparison of the SnO2 gas sensor with FID detector has also been carried out. Experimental results show that the SnO2 gas sensor as a GC detector can meet the requirements for fast analysis of VOCs in environment gases.