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*   Displaying Isotope Patterns
The Isotope Pattern module displays the relevant isotopic profile when you select a structure or fragment in the Mass Frontier application. You can also calculate the isotope pattern from a your molecular formula.
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To display the isotope pattern for a structure
1.
2.
Choose Tools > Isotope Pattern from the Mass Frontier main menu.
The Pattern page of the Isotope Pattern window opens.
3.
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To display the mass, abundance, and accuracy values
1.
Click the Values tab.
The Values page of the Isotope Pattern window opens.
2.
To copy the data, click the Copy as Data button, .
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To display the mass tolerance settings
1.
Click the Parameters tab.
The Parameters page of the Isotope Pattern window opens.
2.
3.
The application supports these tolerance types:
ppm 1 000 000 x ΔM/M
Mass Accuracy (ΔM in AMU or ΔM in MMU)
where:
M = m/z (mass-to-charge ratio)
ΔM = M2–M1 (M1, M2 are two adjacent peaks)
Peaks (m/z values) that fall into the ΔM band are merged into a single peak (m/z value).
4.
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To save the spectrum as a NIST MSP file
1.
The Save MS Spectrum dialog box opens.
2.
The application saves the report in the …\HighChem\Mass Frontier 7.0 \Spectra folder.
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To zoom and pan in the graphical display
Click the Hand button, , in the Mass Frontier toolbar and drag the hand to pan horizontally or vertically.
Similarly, hold down the H keyboard key or the Spacebar to change the cursor to the hand.
Click the Zoom Out button, , in the Mass Frontier toolbar.
Click the Zoom In button, , in the Mass Frontier toolbar.
Click the Zoom to Box button, , in the Mass Frontier toolbar and describe a rectangle.
Similarly, hold down the Z keyboard key and describe a rectangle.
Click the Zoom Reset button, , in the Mass Frontier toolbar to return to full scale.
Click the Zoom Undo button, , in the Mass Frontier toolbar to undo the last zoom operation.
Click the Zoom Redo button, , in the Mass Frontier toolbar to restore the last zoom operation.


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Related Topics:
  Using the Database Manager Window
  Using the Info Page
  Using the Mass Differences Page
  Using the Compare Spectra Page
  Using the Compare Trees Page
  Working with Spectral Records
  Assigning Fragments to Spectral Peaks
  Exchanging Mass Spectral Data Between Modules
  Using the Library Pane
  Processing Data-Reduced Chromatograms
  Using the Search Utilities
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