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采用金属扩散管-芯片式高场非对称波形离子迁移谱(FAIMS)技术对苯丙氨酸进行了快速检测,设定测试压强为250 kP a,金属扩散管温度为190℃,在优化的最佳分析条件下,即:载气流速为2000 mL/min,分离电压为152.8 V时,在正模式下获得了苯丙氨酸的离子特征谱图和补偿电压特征值“0.62 V。另外,利用FAIMS对不同浓度的苯丙氨酸样品气进行了检测,确定了FAIMS检测的定量线性范围为6~20 mg/L和检出限为5.9 mg/L。本实验为FAIMS应用于苯丙氨酸的快速检测提供了重要参考。
Phenylalanine was rapidly detected by metal diffusion tube-chip high field asymmetric waveform ion mobility spectrometry (FAIMS) with a test pressure of 250 kPa and a metal diffusion tube temperature of 190 ° C. In the optimized Under the optimal analytical conditions, ie, the carrier gas flow rate is 2000 mL / min and the separation voltage is 152.8 V, the characteristic curve of the phenylalanine ion and the characteristic value of the compensation voltage are obtained in the positive mode ”0.62 V. In addition, FAIMS was used to detect phenylalanine gas samples with different concentrations, and the quantitative linear range of FAIMS was 6-20 mg / L and the limit of detection was 5.9 mg / L. FAIMS was applied to detect phenylalanine The rapid detection of acid provides an important reference.