费尔格特重访:论二维质谱法中噪音的性质》。

IF 3.1 2区 化学 Q2 BIOCHEMICAL RESEARCH METHODS
Callan Littlejohn, Meng Li, Pui Yiu Lam, Mark P Barrow, Peter B O'Connor
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引用次数: 0

摘要

二维质谱(2DMS)是一种真正与数据无关的采集技术,用于分析复杂的混合物;然而,人们对这些光谱中的噪声性质还不甚了解。在这项工作中,我们测试了 2DMS 是否符合费尔格特原理:(信号/噪声)∝√(数据点数量)。由于 2DMS 的功能是通过多次扫描对碎片区域中的离子进行调制,因此在本实验中,单个扫描被视为数据点。随机噪声是本实验的主要噪声源,系统噪声较小。这意味着可以使用本文详述的快速二维方程确定显示目标碎片离子的二维质谱的最小尺寸。研究还发现,现有去噪算法的影响改变了信噪比与扫描次数之间的关系,使之呈现准线性,而非去噪前观察到的平方根趋势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fellgett Revisited: On the Nature of Noise in Two-Dimensional Mass Spectrometry.

Two-dimensional mass spectrometry (2DMS) is a truly data-independent acquisition technique used in the analysis of complex mixtures; however, the nature of the noise within these spectra is not well understood. In this work, 2DMS is tested for conformity with the Fellgett principle: (signal/noise) ∝ √ (no. of data points). Since 2DMS functions through the modulation of ions through a fragmentation region across many scans, the individual scans are considered data points in this experiment. Random noise was shown to be prevalent as the main source of noise in this experiment with minor systematic noise. This means that the minimum size for a 2DMS spectrum that displays a target fragment ion can be determined using a fast-2D equation detailed herein. The effects of existing denoising algorithms were also found to change the relationship between the signal-to-noise ratio and the scan numbers to be of a quasi-linear nature rather than the square root trend observed before denoising.

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来源期刊
CiteScore
5.50
自引率
9.40%
发文量
257
审稿时长
1 months
期刊介绍: The Journal of the American Society for Mass Spectrometry presents research papers covering all aspects of mass spectrometry, incorporating coverage of fields of scientific inquiry in which mass spectrometry can play a role. Comprehensive in scope, the journal publishes papers on both fundamentals and applications of mass spectrometry. Fundamental subjects include instrumentation principles, design, and demonstration, structures and chemical properties of gas-phase ions, studies of thermodynamic properties, ion spectroscopy, chemical kinetics, mechanisms of ionization, theories of ion fragmentation, cluster ions, and potential energy surfaces. In addition to full papers, the journal offers Communications, Application Notes, and Accounts and Perspectives
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