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更高磁场在傅里叶变换离子回旋共振质谱中的变革效应。

Transformative effects of higher magnetic field in Fourier transform ion cyclotron resonance mass spectrometry.

机构信息

Department of Chemistry and Volen Center for Complex Systems, Brandeis University, Waltham, MA 02454, USA.

出版信息

J Am Soc Mass Spectrom. 2010 Jul;21(7):1218-22. doi: 10.1016/j.jasms.2010.03.033. Epub 2010 Mar 31.

Abstract

The relationship of magnetic field strength and Fourier transform ion cyclotron resonance mass spectrometry performance was tested using three instruments with the same design but different fields of 4.7, 7, and 9.4 tesla. We found that the theoretically predicted "transformative" effects of magnetic field are indeed observed experimentally. The most striking effects were that mass accuracy demonstrated approximately second to third order improvement with the magnetic field, depending upon the charge state of the analyte, and that peak splitting, which prohibited automated data analysis at 4.7 T, was not observed at 9.4 T.

摘要

我们使用三台设计相同但磁场强度分别为 4.7、7 和 9.4 特斯拉的仪器测试了磁场强度与傅立叶变换离子回旋共振质谱性能之间的关系。我们发现,理论上预测的磁场“变革性”效应确实在实验中得到了观察。最显著的效应是,磁场使质量精度提高了大约二到三阶,这取决于分析物的电荷状态,而在 4.7 T 时会阻止自动数据分析的峰分裂在 9.4 T 时则未观察到。

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