极板形四极杆质量分析器性能模拟及优化研究OA

As the application fields of mass spectrometry continue to expand,mass spectrometers are increasingly moving toward miniaturization and portability.To meet the portability requirements of mass spectrometers for rapid on-site detection scenarios,a miniaturized plate-type quadrupole mass analyzer is proposed,and parameters such as plate width and thickness are designed.A multi-physics coupling simulation software is used to analyze the influence of plate width and thickness on ion transmission efficiency.The effects of the Mathieu parameter a,radio frequency f,and ion injection energy E on the ion transmission efficiency of the plate-type quadrupole mass analyzer over a wide mass range(10-150 amu)are investigated.Simulation results show that for a mass-to-charge ratio of 40 amu,the ion transmission efficiency increases with increasing plate width.Within the wide mass range(10-150 amu),using the optimal parameter combination of plate width W=10.5 mm,plate thickness H=2 mm,Mathieu parameter a=0.17,radio frequency f=1.6 MHz,and ion injection energy E=4 eV,the ion transmission efficiency of the plate-type quadrupole mass analyzer reaches above 80％.This performance meets the requirements for rapid mass spectrometry detection in applications such as environmental and soil heavy metal analysis.