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Citation: CHEN Xin, GU Lian-Cheng, XU Fu-Xing, FANG Xiang, CHU Yan-Qiu, XIAO Yu, ZHOU Ming-Fei, DING Chuan-Fan. Simulation Study on Linear Ion Trap with Asymmetric Triangular Electrodes[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(8): 1145-1152. doi: 10.19756/j.issn.0253-3820.191314 shu

Simulation Study on Linear Ion Trap with Asymmetric Triangular Electrodes

1.
Department of Chemistry and Laser Chemistry Institute, Fudan University, Shanghai 200433, China;
2.
National Institute of Metrology, Beijing 100029, China;
3.
Institute of Spacecraft Equipment, Shanghai 200240, China;
4.
School of Materials Science and Chemical Engineering, Institute Mass Spectrometry, Ningbo University, Ningbo 315211, China

Received Date: 3 June 2019
Revised Date: 22 June 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21773035, 21803013).

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.
- Linear ion trap,
- Triangular-electrode,
- Asymmetric structure,
- Theoretical simulation,
- Electric field distribution,
- Mass resolution
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