高压模块性能对数字离子阱质谱仪性能的影响

Effect of High Voltage Module Performance on Digital Ion Trap Mass Spectrometer

摘要: 数字线性离子阱质谱仪的供电高压模块的稳定度、负载变化率等参数对数字离子阱的性能有很大影响。为了研究供电高压模块对仪器性能的影响，本工作基于正在研制的便携式数字线性离子阱质谱仪，以1 mg/L苯、甲苯、二甲苯、氯苯混合标准气体为检测对象，研究高压模块性能改进后仪器性能的变化情况。结果表明：通过增加稳压模块的方法，使离子阱质谱仪一级质谱的质量稳定性、离子响应，二级质谱的隔离效率都有较大幅度的提高；一级质谱中，离子的质量轴波动减小到之前的一半，响应值提高了10%以上，二级质谱离子的隔离效率提高了1.6倍。

Abstract: The performances such as stability and voltage regulation of the power supply modules have great influence on properties of the ion trap mass spectrometer. Based on the digital linear ion trap mass spectrometer under development, the performance of the instrument was studied， when the improved high voltage module was applied using benzene, toluene, xylene, chlorobenzene mixture of standard gas as the measurement target. The results show that the mass stability and ion intensity in MS, ion isolation efficiency and ion dissociation efficiency in MS² have a great improvement. The mass stability improves 100, and ion intensity increases 10% for the MS; ion isolation efficiency of the MS² increases 1.6 times.