GC Image Users' Guide

New Features and Improvements in Release 2.0

GC Image Release 2.0 (March 2009) has many new features and improvements. See the GC Image Users' Guide for full documentation.

Mesh Objects

GC Image R2.0 introduces mesh objects for comprehensive group analysis. A mesh object is a collection of panels that supports shared edges and vertices. Chemically similar compounds often form a cluster of peaks. A panel of a mesh can be drawn to include the peaks of desired compounds and exclude the peaks of other compounds. The mesh allows a set of panes that can be used for comprehensive analysis, i.e., covering all of the relevant regions of the chromatogram. GC Image R2.0 provides a suite of tools that can be used to create complex mesh objects in a short amount of time.

Graphic Group

GC Image R2.0 allows users to define graphic groups. A graphic group allows reporting of summed blob set features for a set of graphics. Each graphic group is comprised of a set of graphics with the same group name that are either areas or included graphics.

CLIC

GC Image R2.0 has significant improvements for the Computer Language for Identifying Chemicals (CLIC)™:

CLIC supports a set of mathematical functions such as power(), sqrt(), ln() and so on.
CLIC supports nested functions and expressions.
Users can specify the peak MS or integrated blob MS with any MS function with "@" operator (for example "MassRank@peak(1)").
CLIC supports eight new MS functions, MassRank(), Correlation(), FirstDerivativeCorrelation(), Euclidean(), AbsoluteValue(), FirstDerivativeAbsoluteValue(), LeastSquares() and FirstDerivativeLeastSquares().
The Ordinal() function supports multiple m/z arguments.
GC Image R2.0 allows users to perform customized global qualitative/quantitative analysis on all blobs with any number of CLICs in Blob Table.
GC Image R2.0 allows users to perform customized local qualitative/quantitative analysis on any blob with Analysis CLIC in Blob Properties.

Linear Retention Index

GC Image R2.0 allows users to define one linear retention index calibration table for each column and automatically computes the linear retention index for all analytes (blobs and area objects).

Calibration

GC Image R2.0 has significant improvements for quantitative analysis:

GC Image R2.0 allows users to define qualifier and quantifier ions through Qualifier/Quantifier Ion Table in Blob Properties.
GC Image R2.0 allows users to perform internal/external standard calibration with TIC or quantifier ion responses.
GC Image R2.0 reports the summarized amount and amount source for blob sets in Blob Set Table.

Blob Analysis Tools

GC Image R2.0 provides several new blob analysis tools and improvements.

Blob Analysis Tool provides principal component analysis on spectra of blobs.
Blob Analysis Tool supports a spectral channel as a plot axis.
Blob Analysis Tool provides a configurable tool tip for mouse-over.
Blob Analysis Tool provides enhanced mouse behaviors.

Template Matching

GC Image R2.0 has several improvements for template matching:

GC Image R2.0 provides a comprehensive quality report for template matching.
GC Image R2.0 allows users to switch between views of the template and the matched peaks and transformed objects.

Filter Report

GC Image R2.0 allows users to define a set of rules to filter blob table with Filter Report.

Multi-Run Comparison Report

GC Project R2.0 allows users to compare blobs, areas and blob sets from multiple images and examine the changing trends with Multi-Run Comparison Report.

New and Improved I/O Support

GC Image R2.0 can export and import mzXML files.
GC Image R2.0 can read modulation periods recorded in the comment field (e.g., "mod=8.0;") of Shimadzu QGD and GCD files.
GC Image R2.0 allows users to specify an intensity threshold to filter out spectral peaks during import.

New and Improved Operations

GC Image R2.0 allows users to specify LIMS numbers for images.
GC Image R2.0 allows users to specify Minimum Volume Filter for Blob Detection.
GC Image R2.0 allows users to set all Blob Detection settings in Deconvolution.
GC Image R2.0 provides standardized and improved mouse behaviors in all modes.
GC Image R2.0 allows users to lay out multiple ion chromatogram windows with Windows menu.
GC Image R2.0 allows users to double click to reset zoom in MS Viewer.
GC Image R2.0 allows users to configure the blob information in the title of MS Viewer.
GC Image R2.0 allows users to copy the selection in MS Viewer to the clipboard as various formats.
GC Image R2.0 provides a setting to save a combined CSV table in Summary Report.
GC Project R2.0 reports detailed run time for each processing step in Process Runs and Auto Process.

The people of GC Image welcome your suggestions of new features, your comments about existing features and documentation, and reports of any problems. We strive to make GC Image meet the needs of our users in their many GCxGC applications.

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