We report on the performance of a cryogenic 2D linear ion trap (cryoLIT) that is shown to be mass-selective in the temperature range of 17–295 K. As the cryoLIT is cooled, the ejection voltages during the mass instability scan decrease, which results in an effective mass shift to lower m/z relative to room temperature. This is attributed to a decrease in trap radius caused by thermal contraction. Additionally, the cryoLIT generates reproducible mass spectra from day-to-day, and is capable of performing stored waveform inverse Fourier transform (SWIFT) mass isolation of fragile N₂-tagged ions for the purpose of background-free infrared dissociation spectroscopy.

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我们报告了一个低温二维线性离子阱（cryoLIT）的性能，该离子阱在17–295 K的温度范围内表现出质量选择性。随着cryoLIT的冷却，质量不稳定性扫描过程中的喷射电压降低，从而导致相对于室温较低的m / z的有效质量转移。这归因于由热收缩引起的阱半径的减小。此外，cryoLIT每天都会产生可重现的质谱图，并且能够执行存储的易碎N ₂标签离子的波形逆傅立叶变换（SWIFT）质量分离，以实现无背景红外解离光谱学的目的。

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