![]() This usually means the resolution of the indirect dimension f1 is kept lower than that of f2. Where n is the number of scans per t1 increment, N1 is the number of T1 increments and Tav is the average length of one scan. However, increasing the number of t1 data points (increments) has a direct impact in the length of the experiment as can be seen from the Total acquisition time for a 2D NMR spectrum: In general, it could be said that the resolution along the direct dimension comes for free in a sense that increasing the number of data points does not augment the acquisition time of the experiment significantly. In the case of 2D NMR, the resolution of direct dimension (f2) depends, among other things, on the number of acquired complex points whilst the resolution of the indirect dimension (f1) is directly proportional to the number of increments (or number of acquired FIDs). Resolution and sensitivity are two key factors in NMR spectroscopy. ![]()
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