期刊
ANALYTICAL CHEMISTRY
卷 84, 期 6, 页码 2923-2929出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac3000122
关键词
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资金
- University of Warwick, Department of Chemistry
- Warwick Centre for Analytical Science (EPSRC) [EP/F034210/1]
- EPSRC [EP/F034210/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F034210/1] Funding Source: researchfish
The Fourier transform spectrum can be presented in the absorption-mode (commonly used in FT-NMR), magnitude-mode (FT-ICR), and power-mode (engineering applications). As is routinely used in FT-NMR, it is well-known that the absorption-mode display gives a much narrower peak shape which greatly improves the spectrum; recently, the successful solution of the phase equation allowed broadband phase correction which makes it possible to apply the absorption-mode routinely in FT-ICR. With the empirical evidence provided herein, it has been confirmed that in addition to the improvement on resolving power, compared to the conventional magnitude-mode, the new absorption-mode improves the signal-to-noise ratio (S/N) of a spectrum by 1.4-fold and can improve the mass accuracy up to 2-fold with no extra cost in instrumentation. Therefore, it is worthwhile to apply and promote absorption-mode in routine FT-ICR experiments.
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