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| PROCESSING YOUR DATA | ||
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If your data is provided to you already transformed, with preliminary phase corrections, the operations described in this section have already been done. You may review this material to learn about these operations, or click here to learn how to further process your NMR spectrum. This section assumes that you are using NUTS software to analyze your data. To learn about operations performed on the NMR signal (independent of software used), click here. |
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The NMR spectrometer records data as a function of time, so the x-axis of the free-induction decay (FID) is given in units of seconds, and several data-processing steps are done in this time domain. Some NMR systems are set up so that many of these steps are done automatically; click here to skip this section. To access help with a specific NUTS operation, click here. |
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| Characteristics of the NMR signal | ||
| An NMR signal, called a free induction decay, is made up of oscillating components that start at a maximum and decay away with time. These components may be of varying frequency, intensity, and decay rate. | ||
| DC offset removal | ||
| While an NMR signal is being acquired, the data may be shifted slightly in the vertical direction due to slight instrumental errors. This can result in a glitch, or spurious peak, in the spectrum. | ||
| To perform a DC-offset correction in NUTS, type bc. As shown below, it is not always obvious in the FID that this correction has been done (click here to view larger versions of these screens): | |
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