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- W1983514531 abstract "Although many papers have been published in the last 25 years on the subject of “elimination” of large unwanted resonances (Z-7), such as the Hz0 signal in ‘H NMR, refinements are still being reported practically every month. For example, the last five issues of this journal (July-October, 1986) contain three articles on this subject (&IO). Obviously, this activity is motivated not only by the importance of NMR for studying minor (low-molarity) components in the presence of major ones such as H20, but also by the various limitations and difficulties associated with each available solvent-suppression technique. Furthermore, peak suppression may be difficult, inconvenient, or undesirable (i) when there are many large peaks, (ii) when one or more of the small peaks are very close to a large one, and (iii) when the relative intensities of small and large peaks are being studied. In this report we show that careful attention to dynamic range and lineshape quality enables the NMR spectroscopist to study minor components without suppression of the major resonances, even when each minor peak has only lop4 the intensity of a major one and when the separation between the two peaks is only 100 Hz or even less. A quantitative discussion of the feasibility of studying minor components by NMR spectroscopy, with or without the use of major peak suppression, is facilitated by the introduction of three parameters, D, A, and R, defined by Eqs. [ l]-[3]" @default.
- W1983514531 created "2016-06-24" @default.
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- W1983514531 date "1987-03-01" @default.
- W1983514531 modified "2023-10-17" @default.
- W1983514531 title "Analysis of minor components by ultrahigh resolution NMR. I. Evidence for the detectability of weak resonances near peaks which are 10,000 times larger, without suppression of the large peaks" @default.
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- W1983514531 doi "https://doi.org/10.1016/0022-2364(87)90190-9" @default.
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