本文以强场非对称波形离子迁移谱(FAIMS)芯片搭建的检测设备成功实现了对丙酮、苯酚和环己烷三种有机物及其混合物的检测。通过痕量气体发生器产生丙酮、苯酚和环己烷气体,利用气体流量计调节空气和有机物气体比例,模拟空气中不同浓度的有机挥发物,混合气体进入检测核心,得到相应的信号,并通过软件转化为对应的谱图;对比背景和含有机物气体的谱图,可确定有机物在谱图上的位置。该设备对不同浓度样品检测结果显示检测信号值与浓度成高度正相关。通过对正负模式下交变电场强度和补偿电压大小的调节,可以实现对混合物组分的分离检出。
The equipment based on field asymmetric waveform ion mobility spectrometry(FAIMS) chip was established to detect acetone,phenol,cyclohexane and their mixtures successfully. Gas of acetone,phenol and cyclohexane was vapored by trace gas generator. The ratio of air and organic gas was adjusted by the mass flow controller to generate organic gas of various concentrations. The mixture was sent into the chip core,then the signal was adopted and transformed into spectrograph. Organic gas was confirmed and detected by comparing the spectrograph of background with the spectrograph of organic gas. The test results showed there was a relationship in direct proportion between the concentration of organic gas and the signal value. The organics in mixtures could be determined separately by regulating the positive and negative mode of alternating electric field and adjusting the compensation voltage.