When you import a spectrum from a supported format (see “Spectral Data Processing”) in Processor or Profiler, you can choose from a number of import options.
Table 4.1. Import NMR Data Options
Sample contains a Chemical Shape Indicator (CSI) | Indicate whether a Chemical Shape Indicator (CSI) indicator is present in the sample. Specify the CSI used, and enter its concentration in millimoles per litre (mM). You can choose DSS, TSP, Formate, or a Custom CSI (see “Define Custom CSI”). |
Sample contains one or more pH Indicators | Indicate whether any pH indicators are present in the sample. If they are, Processor will attempt to automatically detect the pH of the sample, subject to the specified uncertainty, using signals from imidazole, creatinine and DFTMP. You must have at least one of these pH indicators present in the sample to attempt automatic pH detection. If the pH is not detected, it will be set to 7.00. You can change the pH manually after the spectrum is imported. |
Phase Correction | Automatically apply phase adjustments to your spectrum. When importing Agilent
raw data (fid ), you are given two options:
Auto applies automatically-determined phase angles, while
Import from VNMR imports the phase angles found in the VNMR
procpar file.
|
Automatic Baseline Correction | Automatically apply baseline correction to your spectrum. Linear (Drift) applies a simple two-point linear baseline correction, while Spline applies a cubic spline baseline correction based on automatically-determined breakpoints. |
Automatic Shim Correction | Automatically apply shim correction to your spectrum. You can set a target linewidth in the Linewidth (Hz) field. |
Reverse Spectrum (Bruker only) | Reverse your spectrum horizontally. Only available when you import Bruker
raw spectrum files (fid ).
|
Line Broadening (Hz) | Apply an exponential FID weighting (line broadening) function to your data. Enter a positive value in Hz. |
Delete Water Region | Automatically remove the water region from the spectrum during the import process. |
Zero Fill To (FIDs only) | Enable zero-filling. Automatic zero-fills to the nearest power
of two that is at least twice as large as the number of points acquired in your
spectrum. This is normally the correct choice. You can also choose a specific
number of data points, if you prefer. This option is only available when you
import raw spectrum data (e.g. fid files).
|
Defaults | Restore all import settings for this type of imported spectrum to their default values. |