Gas Chromatography - Tandem Techniques - Modern GC/IR Systems > Thermogravimetric Analysis (TGA) Coupled with GC/IR and GC/MS > Page 62

Courtesy of the Perkin Elmer Corporation

 

Figure 50. The Stacked Plots of the TGA/FTIR Tandem Analyses of Alkylbenzimidzole Carried Out in Nitrogen and Air

 

The cryostatic interface provides a sensitivity at least one, if not two, orders of magnitude greater than the contemporary light pipe interface. Unfortunately, the cryostat interface is a mechanically complicated device and extremely expensive, relative to the light pipe. As a result, the cryostat has been withdrawn from the market and at present is no longer commercially available. This is most unfortunate and leaves the analyst with the light pipe as the only commercially available alternative. Nevertheless, there is a need for a high-sensitivity interface, and this need will continue to grow as the demands of the environmental, forensic and biological sciences become greater.