GC Image User Forum

How do i reference library search results in CLIC? There are a few functions that reference library search results. Here are some examples: hitlist("benzene") < 5 - If benzene is in the top 5 of the hit list, the blob will be selected. hitmatch("benzene") > 800 - If the NIST mat...

How can I select blobs using base peak?

You can do this using the massrank or ordinal functions. If we want to select all blobs with a base peak of 57, we could use either of the following examples:
massrank(1) = 57
ordinal(57) = 1

How do I get the intensity of a spectra peak in CLIC expression? This can be done using the intensity function. To retrieve the intensity of a spectrum at m/z 57, we would type intensity(57) . An example use for this would be to only select blobs where the intensity is over a certain amount. We cou...

How do I build and run my first CLIC expression? Start GC Image Open the exampleMS.gci file provided with GC Image Filter > Correct Baseline Filter > Detect Blobs Edit > CLIC Expression In the main expression text area type retention(1) > 3 Set the Data Type to Blob Click the Select Blobs button Co...

What are CLIC Expressions? CLIC expressions are an important part of GC Image that allow users build rules for selecting and filter blobs. This gives users the ability to quickly find the parts of the chromatogram they are interested in. CLIC expressions are also used to build filtered images, cons...

GC Image 2.4 Update a1 Now Available. Bug Fixes: Show # of Template Peaks and # of Peaks Matched as -1 when Auto Feature Combo Boxes in Colorize Dialog do not Initialize Correctly Could Not Save Analysis with Unprocessed Image Extract MS/MS Option is Never Enabled Report "not an analysis folder...

We are pleased to provide early access to the 2.4 Alpha release of GC Image for registered users of the User Forum. This alpha release is a development version for more adventurous users who are willing to experiment with new features. The new features are not considered stable and may or may not be...

Hi, I am a little confused about what you want to export. The software can export a number of different data sets. This includes the Blob Table, Blob Set Table, Template Table, Text View, 1D Views, etc. The software can also export the image into a number of different formats. Are any of these what ...

My chromatogram has a distracting background from CO2 and Oxygen leakage. How can I remove these unwanted mass peaks from the image? You can filter mass peaks from a chromatogram during import. To do this: File > Import Image Select the desired chromatogram with the file chooser In the import dialog...

You can perform local blob detection for the specific region.

To do this:

• Switch to Graphics Mode
• Draw a single graphic over the region of interest
• Edit > Local Blob Detection

Useful Links:

• Graphics and Areas
• Graphics FAQ
• Local Blob Detection