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利用FAIMS(强场非对称波形离子迁移谱)芯片搭建的检测设备,成功实现了对牛奶和奶粉中三聚氰胺的检测。通过金属扩散管和顶空进样装置,以空气为载气,将加热挥发的样品送入检测核心,得到相应的信号,并通过软件转化为对应的谱图;对比含有三聚氰胺的样品和纯样品的谱图,可确定三聚氰胺在谱图上的位置。该设备对不同浓度样品检测结果显示,其精密度低于液相色谱-质谱联用仪,检测信号值与浓度成高度正相关。利用含三聚氰胺样品对设备样机进行量值刻度,在软件中设置报警浓度,实现对乳品中三聚氰胺的快速检测。
The use of FAIMS (Strong Field Asymmetric Waveform Ion Mobility Spectroscopy) chip set up testing equipment, the successful realization of the milk and milk powder in the detection of melamine. Through the metal diffusion tube and headspace sampling device, using air as the carrier gas, the heated volatile sample is sent to the detection core to obtain the corresponding signal and converted into the corresponding spectrum by the software; comparing the sample containing melamine with the pure sample Of the spectrum, you can determine the location of melamine in the spectrum. The device for different concentrations of the sample test results show that the precision is lower than the liquid chromatography - mass spectrometry, the detection signal value and concentration into a highly positive correlation. Melamine samples containing equipment for the use of sample size scale, set the alarm concentration in the software to achieve rapid detection of dairy melamine.