JCAMP Data File Viewers

Macintosh Viewer last updated on: Saturday, 05-Aug-2017 14:55:08 CDT; size: 8.3M bytes

Download the Macintosh Jcamp Viewer.

Windows viewer last updated on: Saturday, 05-Aug-2017 14:55:30 CDT; size: 4.1M bytes

Download the Windows Jcamp Viewer.

Linux viewer last updated on: Wednesday, 02-Aug-2017 13:41:13 CDT; size: 14M bytes

Download the Linux Jcamp Viewer.

This version of the viewer has the capability to directly download and process raw FID data files from the UWSP data server. Some very brief documentation on the data processing capabilities is available here.

JCAMP-DX spectral files are best displayed using the JCAMP viewer as the Chime plugin(Windows only) seems unable to display spectra with a large number of data points in an AFFN JCAMP data file.

All jcamp files on this site can be viewed as well as those on the NIST web site. In general, all compounds on this site will have infrared, 1H, 13C, and mass spectra. The viewer reads and saves in AFFN format only. It can read compressed JCAMP formats, but writes only AFFN format. See the official JCAMP specification site for details.

General Viewer Features:

All spectra can be expanded in both X and Y coordinates via commands or buttons on the screen. Click and drag will outline a region which can be expanded or displayed via an inset window. Expansion will automatically rescale the Y dimension to bring the largest peak to full scale. Annotations (simple text labels) can be added via the annotation button (toggles on and off). These annotations will be saved if the file is saved via file:save. Right click on a peak will bring up a contextual menu. One of the options is 'Mark peak' which will produce a label showing the X coordinate of the peak. Labeled peaks will also be saved if file:save is executed. Automatic peak picking results in identification of all all peaks above the threshold which can be adjusted via on screen controls. A peak table can also be displayed.

In general, anything displayed on screen can be printed or copied to the clipboard. If Quicktime is installed, the screen display can be saved in jpeg format suitable for direct display on web pages. All jpeg files on our web site were created using this feature of the viewer. Other picture formats may be available as well depending on your system configuration.

Infrared Spectra:

Infrared spectra in the database were recorded and converted using a Nicolet FT-IR spectrometer. The default display format is % transmittance versus wavenumber (cm-1), but absorbance is also available. This default can be changed via the preferences dialog and may be overridden by preferences within the JCAMP file itself.

Mass Spectra:

Mass spectra in the database were recorded on a Hewlett-Packard GC/MS and converted to peak table format using software delveloped locally. Normal expansion and labeling is available.

1H nmr spectra:

Proton nmr spectra can be displayed in both Hz or ppm assuming the spectrometer observe frequency is available in the file header. The default can be changed via the preferences dialog. In addition, automatic integration can be performed. Raw FID data is available for some compunds in both JCAMP ntuples and MacNMR format. The viewer can read and display the real or imaginary portion of the JCAMP FID.

13C nmr spectra:

Carbon nmr spectra can be displayed in both Hz and ppm assuming the spectrometer observe frequency is available in the file header. The default can be changed via the preferences dialog. Raw FID data is available for some compunds in both JCAMP ntuples and MacNMR format. The viewer can read and display the real or imaginary portion of the JCAMP FID.

Nifty features:

  1. Save as JPEG has been added to the file menu and works on both platforms if Quicktime 4 is installed. Another way to get files into a word processing document.
  2. Copy spectrum to the clipboard now works on Windows and Mac platforms.
  3. NMR spectra can be displayed in ppm or hz.
  4. An inset button has been implemented which displays the selection in a floating window while maintaining the full spectrum display in the main window. The inset is dynamically updated when a new region is selected in the main window. The inset window can be moved and resized. When the inset window is closed a copy of the inset window is displayed on the spectrum. Multiple insets can be displayed and edited. Insets are copied to the clipboard or printed as displayed.
  5. Buttons to display the integration trace, peak pick and peak list have been added. The preferences can be set to show some of these data upon file open.
  6. Chemical formulas and chemical structures can be pasted into the currently displayed spectrum. They will be saved in the data file (Macintosh only).
  7. The contents of the peak list, structure and inset windows will be copied to the clipboard or printed. High resolution printing on postscript printers has been implemented and functions well. It may fail on inkjet printers. Testing is in progress.
  8. Display of the ##Title line from the data file on the spectrum is now optional.
  9. A simplistic spectrum overlay capability has been implemented to overlay spectra of the same type. An overlay button will appear when two or more comparable spectra are opened. Only the first three will be overlaid.
  10. A Database item has been added to the file menu which allows direct access to the whole database from the viewer over the internet. This is hard coded into the application and points at http://pslc.uwsp.edu/ initially. A preference item is now available to allow pointing at a local web server. In addition to the above URL, the database is also available at http://pslc.ws/spectra. This may be modified at some point to allow direct access to the database stored on a local drive or CD. Search facilities may be added at a later time.
  11. A special JCAMP file format has been contructed to allow students to access problem sets via the viewer. Several features of the viewer are disabled when files of this type are loaded. Try this URL after installing and configuring the viewer.
  12. Multiple editable inset capability has been added. Insets will print to postscript printers.
  13. A new file menu item has been added which brings up a minimal web viewer to access the UWSP spectral data server.

Change log:

7-20-2016 Fixed the wandering normalization peak problem and modified the read
routine so it would properly read and display saved integrations. Now at version 2.7.0.
7-18-2016 Changed version number to 2.6.9 and recompiled to include most recent
improvements for world wide access.
7-15-2016 Removed 200 MHz nmr log menu item. Removed auto-integrate button and 
modified integrate button code so that an auto-integration is performed on the first click.
The integral used for normalization is now marked with an N. The auto reset of amplitude 
when integration is turned on was fixed.
6-21-2016 Added an automactic reference setting routine to the process window 
(assume TMS at zero - auto_set_TMS_ref method) that is run before each peak pick. 
It assumes that TMS located somewhere between 0.1 and -0.1 ppm and then searches 
for the maximum peak in this range after which it sets this peak to zero.
6-20-2016 Modified all URL request code so both http and https requests are supported.
6-16-2016 An algorithm was added to the carbon-13 peak pick to differentiate 
CDCl3 solvent peaks. The peaks list window now generates a comma
separated string that conforms somewhat to standard ACS journal format. 
More deuterated solvents will be added as time allows. Changed integration display
so traces would be plotted above peaks and below peak picks.
6-10-2016 Improved peak and integration discrimination algorithms for proton nmr 
so the auto integration routine works better. Peaks outside integration regions are
marked with the grid color to differentiate them from peaks inside integrals. These 
peaks are omitted from the peak list window. The peaks list window now generates a comma
separated string that conforms somewhat to standard ACS journal format. The S/N 
is used to select the peak picking threshhold. Fixed spectrum offset calculation in 
the auto process button code.
6-4-2016 Copy marked peaks table with spectrum copy implemented. Overlay 
in process Window expansion,contraction and inset plotting fixed. Adjusted mark
peaks to select all peaks within 3% of max in range.
3-2-2016 Added spectrum reversal button to the process window.
2-17-2016 Fixed peak label printing to laser printers so the whole label prints 
properly. Made the vgrid and xgrid default color a bit darker so it shows
up better when printed.
01-13-2016 Extracted $$ D1  from Bruker header which the relaxation delay. 
Important for proton and carbon spectra where T1 is relatively
large for some spins. Increase to 5 x largest T1 if peak is barely visible in 
carbon or accurate proton integration is required.
12-20-2015 Fixed grid line drawing for process and spectradisplay windows. 
Added pref items to turn x and y grids off/on independently and allow
color selection. Grids are now on by default. Added pref item to control 
fontsize for integral text. Fixed convert to Hz on save then convert back to PPM so
proton integrals are properly retained. The mark peak and mark peaks 
ContextualMenu items have been restructured and cleaned up to work with
nmr and ir spectra.
10-2-2015 Fixed horizontal grid to be fixed at 10 divisions with no labels.
9-12-2015 Added horizontal grid as default when grid is turned on. Will 
be default at first use. Fixed J value button so it is enabled  more appropriately. 
Added a Mark Peaks ContextualMenu that will try to mark all peaks in the selected range
based on the current threshold setting. It seems to work fairly well for 
nmr data. Somewhat less effective for IR and MS.
1-7-2015 Fixed window size for 1280x960 pixels.  Added ability to change 
overlay x, y, intensity and color from the overlay table.
10-5-2014 Fixed problems with improper suffix/extention on windows platforms.
8-15-2014 Added the ability to change some font sizes.
6-30-2014 Fixed x,y export in process window when only real values are available.
6-7-2014 The readfile routine was modified to read picospin jcamp files (missing ##END= line).
5-6-2014 The sort bug in the j vlaue calc routine was fixed.  A delete button was 
added to makeinset window so it would be more obvious how to delete an inset.
4-19-2014 Found some serious errors in JDXDecompressor. The DIF/DUP method was 
failing to change the lineindex properly and the dup count routine was increasing 
the dup count one more than requested. There are still some calculation errors 
in the coupling constant calculation routine. It might be nice to try some multiplet analysis.
3-30-2014 Fixed dataaccess and specdata floating window visibility bugs during 
2-24-2014 Fixed integration error when there were zero integrals in 
intregral_calc_ranges. Fixed autoplot on first open in spectradisplay.
1-11-2014 Added mouse wheel preference selection. Default is mouse wheel support off.
Fixed annotate function in process and spectradisplay.
12-13-2013 Added d key detect in Search_jdxlist so we don't have to mouse over 
to the download button.
Fixed spectrum replot on window resize.
Fixed show integrations and marked peaks in file saved by viewer.
Fixed process file save so peaks, coupling constants and integrations would be 
written and read properly.
9-7-2013 Fixed bug in spectradisplay that caused contract button to be displayed, 
but disabled. Version 2.5.0
9-2-2013 Modiefied setref window so chemical shift EditFields can be stretched to 
show more figures. Modified peakmark routine so that peaklist Window appears 
to the right side of the spectrum window.  Annotate still does not function properly.  
Another day on that one. Increased to version 2.4.9.
8-31-2013 Changed the default widths of the columns in overlay listbox and 
turned on column resize for the overlay listbox.
8-25-2013 added trace feature to process and makinset windows which can be 
activated from the prefs windows. Edit sectradisplay to support new makinset
8-24-2013 Added utilities module - convert boolean to string. Changed process.save 
to save in hz mode using hz/point and ouput ##.SHIFT REFERENCE=. 
Also modified readprocess to give ##.SHIFT REFERENCE= preference in ppm reference 
of nmr spectra.  Numerous corrections to makinset and process windows
to support mouse enabled x and y expansion. Edit insets works correctly for nmr.
7-29-2013 Added proper conversion of offset in Bruker FID jcamp files.
7-25-2013 Converted java code from JSPECVIEW sourceforge project to decompress 
JCAMP data files in fixed, packed, squeezed, and dif/dup format as produced
by Bruker Topspin 3.0.  It is implemented for the process (nmr) windows only.

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