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Acquisition times, relaxation rates and solvent and temperature effects as sensitivity parameters for quadrupolar nuclei
Author(s) -
Gerothanassis Ioannis P.
Publication year - 1983
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/omr.1270211203
Subject(s) - sensitivity (control systems) , relaxation (psychology) , line (geometry) , nuclear magnetic resonance , resonance (particle physics) , resolution (logic) , noise (video) , spectral resolution , signal (programming language) , line width , spectral line , chemistry , analytical chemistry (journal) , physics , atomic physics , optics , mathematics , chromatography , psychology , social psychology , geometry , astronomy , electronic engineering , artificial intelligence , computer science , engineering , image (mathematics) , programming language
The relationship between the signal‐to‐noise ration and T 2 and, hence, the line width of a resonance for quadrupolar nuclei, with particular reference to 17 O at natural abundance, is discussed. Emphasis is placed on the importance of choosing appropriate FID acquisition times related to the T 2 values or resonance widths of the quadrupolar nuclei. When this is feasible (i.e. when the principal resonances in a spectrum have similar widths) the signal‐to‐noise ratio attainable against a flat base line in a given time of spectral accumulation is independent of resonance line width. Although resolution improvements can be made by using appropriate solvents or elevated sample temperatures, the sensitivity has been to be strongly dependent on the acquisition parameters used.