Citation: XIE Xiao-Dong, XU Fu-Xing, YANG Hai-Yang, XIAO Yu, JIANG Jian, DING Chuan-Fan. Structure and Property of Ladder Electrode Linear Ion Trap Mass Analyzer[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(6): 994-1000. doi: 10.11895/j.issn.0253-3820.151019 shu

Structure and Property of Ladder Electrode Linear Ion Trap Mass Analyzer

1.
Department of Chemistry and Laser Chemistry Institute, Fudan University, Shanghai 200433, China;
2.
Shanghai Satellite Equipment Research Institute, Shanghai 200240, China

Received Date: 24 March 2016
Revised Date: 18 December 2016

Fund Project: This work was supported by the National Ministry of Science and Technology of China (Nos. 2011YQ14015006, 2001YQ06010003)

Figures(8)

Theoretical study and experimental test of a new ion trap mass analyzer-ladder electrode linear ion trap (LeLIT) were reported. The LeLIT was composed of two pairs of ladder electrodes and one pair of end-electrodes. By optimizing the geometric structure of ladder electrodes, we optimized the electric field distribution for optimum mass analysis. Since the distribution of electric field can be controlled by the adjustment of LeLIT structure, LeLIT have better performance than rectilinear ion trap theoretically. Due to its simpler structure than hyperbolic electrode LIT, LeLIT can be easily built. In this work, the height, width and field ratio were adjusted for optimizing the property of LeLIT, and a mass resolution of 10150 was obtained when the mass scan speed was 225 Da/s for a LeLIT with X₀×Y₀=9 mm×5 mm dimension. The preliminary experimental result showed that the LeLIT has proper tandem mass spectrometric performance as any conventional ion trap mass analyzer.
- Ion trap mass spectrometer,
- Ladder electrode,
- Electric field distribution,
- Mass resolution,
- Tandem mass spectrometry analysis
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