Shimadzu- Multi Dimensional Gas Chromatograph System (Model:MDGC/GCMS Series)

The multi-dimensional GC/GCMS system uses two columns with different separation characteristics to achieve high-resolution analysis not possible with a conventional single column. Components insufficiently separated as they pass through the first column (1st column) are introduced ("heart-cut") into a second column of a different type (2nd column) to separate their analytes.

Multi-Deans Switching
In the past, samples have been introduced to columns using the switching mechanism known as Deans-switching. However, this system results in such problems as a reduced recovery rate and fluctuations in the retention time.
The MDGC/GCMS Series system incorporates multi-Deans switching, a new mechanism that significantly reduces the likelihood of fluctuations in the retention times of eluted components, even if switching is performed several times.

MDGC Analysis Conditions Display Window

MDGCsolution Software

MDGC Analysis Conditions Display Window
Using the "MDGCsolution" MDGC control software, the flow rate conditions for both columns and the switching program can be set simply with mouse operations while viewing the chromatogram obtained with the 1st column.

One important feature of MDGCsolution is that it allows the switching settings to be performed while viewing the chromatogram. If you move the cursor near a peak to be heart-cut on the chromatogram and double-click, the switching is set in units of 0.01 minutes. Because operation is this simple, hardly any time is required when performing multiple switching or when creating multiple methods with different switching timings. It is also possible to create a method during analysis using the Offline Editor menus.

In addition to GCMS, various other detectors, such as an FID or FPD, can be used with the MDGC/GCMS series. For example, a headspace sampler and thermal desorption system can be connected and controlled as a pretreatment system. When not using the MDGC/GCMS series as an MDGC system, it is possible to use the GC and GCMS components as independent systems by changing the column and detector connections.