同轴型非对称场离子迁移谱仪分离与聚焦原理的数学模型

Mathematical model for ion separation and focusing principles of coaxial high-field asymmetrical waveform ion mobility spectrometer.

同轴型非对称场离子迁移谱仪能在室温、大气压条件下对离子混合物进行快速分离和聚焦,是一种新的分离方法。本文以简单的数学模型说明同轴型非对称场离子迁移谱仪的分离与聚焦原理。模型结论表明,非对称场离子迁移谱仪的分离聚焦效果与驱散电压、非对称场电源的频率、同轴圆筒的结构及离子的种类等因素有关。该模型以文献报道数据为基础,模型的结论与文献报道实验结果符合较好。

The coaxial high-field asymmetrical waveform ion spectrometer is a new method for rapidly separating and focusing ion mixtures under room temperature and atmospheric pressure. In this paper, the ion separation and focusing principles of coaxial high-field asymmetrical waveform ion spectrometer are explained with a simple mathematical model. The model indicates the separation and focusing effects are influenced by the dispersion voltage, the frequency of the high-field asymmetrical power supply, the configuration of coaxial cylinders, the kinds of ions, etc. The mathematical model is based on published data and the conclusions of the model agree fairly well with experimental results reported in literature.