阶梯电极离子阱质量分析器的结构与性能

发布时间：2018-04-08 08:48

本文选题：离子阱质量分析器　切入点：阶梯电极　出处：《分析化学》2016年06期

【摘要】：本研究从理论上优化了一种新型结构的线型离子阱质量分析器-阶梯电极离子阱质量分析器,它是由2对阶梯电极与1对端盖电极组成。与传统平板电极矩形离子阱长阶梯电极离子阱相比,具有调节电场分布的优点,同时在几何结构设计上更接近于双曲面电极结构,但比双曲面电极更容易加工。通过改变阶梯电极结构的高度、宽度、场半径比例等几何参数,实现了对离子阱内部电场分布的优化,从而实现离子阱性能的优化。理论模拟研究结果表明,根据几何结构和电场分布优化获得的阶梯电极离子阱质量分析器(X0×Y0=9 mm×5 mm),可以在225 Da/s扫速下获得10150的质量分辨率。阶梯电极离子阱结构简单,分辨能力明显高于矩形离子阱。初步的实验结果表明,阶梯电极离子阱具有较好的串级质谱分析性能。
[Abstract]:In this paper, a new type of linear ion trap mass analyser, step electrode ion trap mass analyzer, is theoretically optimized. It is composed of two pairs of step electrodes and one pair of end cap electrodes.Compared with the traditional rectangular ion trap with flat electrode, the long step electrode ion trap has the advantages of adjusting the electric field distribution, at the same time, it is more similar to the hyperboloid electrode structure in geometric structure design, but easier to process than the hyperboloid electrode.By changing the geometric parameters such as the height, width and ratio of field radius of the ladder electrode structure, the electric field distribution in the ion trap is optimized and the performance of the ion trap is optimized.The theoretical simulation results show that the mass analyzer X _ 0 脳 Y _ (0) 9 mm 脳 5 mm can obtain a mass resolution of 10150 at 225 Da/s sweep speed.The structure of the ladder electrode ion trap is simple and the resolution is obviously higher than that of the rectangular ion trap.The preliminary experimental results show that the step electrode ion trap has good performance of cascade mass spectrometry.
【作者单位】：复旦大学化学系激光化学研究所;上海卫星装备研究所;
【基金】：国家科技攻关项目(Nos.2011YQ14015006,2011YQ06010003)资助~~
【分类号】：O657.63

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