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A new tandem mass spectrometer for photofragment spectroscopy of cold, gas-phase molecular ions

机译:新型串联质谱仪,用于冷气相分子离子的光碎光谱分析

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We present here the design of a new tandem mass spectrometer that combines an electrospray ion source with a cryogenically cooled ion trap for spectroscopic studies of cold, gas-phase ions. The ability to generate large ions in the gas phase without fragmentation, cool them to ∼ 10 K in an ion trap, and perform photofragment spectroscopy opens up new possibilities for spectroscopic characterization of large biomolecular ions. The incorporation of an ion funnel, together with a number of small enhancements, significantly improves the sensitivity, signal stability, and ease of use compared with the previous instrument built in our laboratory. © 2010 American Institute of Physics Article Outline INTRODUCTION INSTRUMENTATION Nanospray source Ion funnel Hexapole ion guide or trap Gate valve Mass selection and octupole ion guide Cryogenic 22-pole ion trap Mass-selected ion detection Electronics EXPERIMENTAL RESULTS Mass spectra and ion currents UV excitation spectrum COMPARISON WITH THE PREVIOUS INSTRUMENT SUMMARY
机译:我们在此介绍一种新型串联质谱仪的设计,该质谱仪将电喷雾离子源与低温冷却离子阱结合在一起,用于冷,气相离子的光谱研究。能够在气相中生成大离子而不会碎裂,在离子阱中将其冷却至〜10 K并进行光碎裂光谱学的能力,为大分子生物分子的光谱表征开辟了新的可能性。与我们实验室中内置的以前的仪器相比,结合使用离子漏斗以及一些小的改进,可以显着提高灵敏度,信号稳定性和易用性。 ©2010美国物理研究所文章大纲简介仪器简介纳米喷雾源离子漏斗六极离子导管或阱闸阀质量选择和八极离子导管低温22极离子阱质量选择的离子检测电子学实验结果质谱和离子流UV激发光谱比较上一个仪器摘要

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