【摘要】 三角形电极线形离子阱具有结构简单、易加工和质量分析性能好等优点。本研究使用理论模拟方法研究了两种非对称三角形电极线形离子阱内部电场成分分布及质量分析能力:离子出射方向上两个电极角度相同,但与另外两个相同电极的角度不同;离子出射方向上一个电极角度与其它3个相同电极的角度不同。模拟结果表明,当三角形电极线形离子阱出射方向上的一个电极角度为137°,另外3个电极角度为140°时,线形离子阱内部同时引入了奇数阶场和偶数阶场,当扫描速度为1900 Da/s,分析m/z=609 Da的离子的质量分辨率可达到7186。同时,线形离子阱的灵敏度和精度也得到明显提升。更多还原

【Abstract】 The triangular-electrode linear ion trap(TeLIT) has many advantages such as simple structure, easy processing and high quality analysis performance. In this work, the internal electric field composition and mass analysis ability of two asymmetric TeLIT were explored by using theoretical simulation method, including(1) two electrodes in the direction of the ion exiting had the same angle but differ with the other two identical electrodes, and(2) one electrode in the direction of the ion exiting had the different angle compared with the other three identical electrodes. The simulation results showed that when one triangular-electrode with the angle of 137° in the direction of the ion exiting and the other three with the angle of 140°, odd and even order fields were introduced simultaneously in the linear ion trap, and when the scanning speed were 1900 Da/s and at m/z 609 Da, the mass resolution could reach 7186. The sensitivity and accuracy of the linear ion trap was also improved.更多还原