芯片级高场非对称波形离子迁移谱技术检测危险品

摘要

An in-situ analytical procedure employing silicon chip based ultra high field asymmetric waveform ion mobility spectrometry(FAIMS) via direct sniffing was developed.The sample introduction temperature was 50 ℃.The carrier gas flow rate and the sample flow rate were 1500 mL/min and 100 mL/min respectively.Ten listed hazardous chemicals,which were prohibited for public transportation in China,were selected to verify the procedure in terms of validity,sensitivity and selectivity.Recognition algorithm was also developed for the FAIMS fingerprint spectral.Ten chemicals were resolved with high reproducibility at the concentration from 0.1 to 20 mg/L.In comparison with current competing instruments,the microchip-based FAIMS instrument,which features its simplicity,high sensitivity and selectivity,fast response and free of sample pretreatment,opens up new applications in the field of public security and homeland security.%建立了吸气法-芯片级高场非对称波形离子迁移谱(FAIMS)技术,设置进样温度为50℃,载气与样品气流量分别为1500和100 mL/min时,测定了10种国家交通部门规定严禁携带的易燃易爆危险品.实验结果表明,利用FAIMS技术可以有效检测多种危险品.实验得到了10种危险品的FAIMS图谱,并对其进行了指纹识别.利用扩散管辅助技术得到10种物质的检测浓度范围约为0.1 ～20 mg/L.此方法方便快速,灵敏度高,具有很好的应用前景.