On-Line Thermogravimetry/Gas Chromatography/Mass Spectrometry

Simple, inexpensive mass spectrometric analyzer for thermogravimetry

“…Evolved gas analysis (EGA) was used in conjunction with TG as early as 1953 when Zemany trapped the gases exiting a TG instrument in multiple containers for subsequent analysis. As time has progressed, however, more sophisticated techniques for EGA requiring less labor and yielding better results have been used including mass spectrometry (MS), gas chromatography (GC), and Fourier transform infrared spectroscopy (FTIR) . While each of these techniques has their individual strengths and weaknesses, MS is often the most versatile and useful for characterization.…”

Volatile Mixture Analysis by Repetitive Injection Fast Gas Chromatography/Mass Spectrometry

“…For those instances when it is desirable to monitor multiple substances, methods that can simultaneously detect and quantify volatile mixture components are needed. Gas chromatography is a method that is commonly employed to separate and quantify multiple gas phase mixture components. , The advantages of using gas chromatography for separation of the volatile mixtures generated during thermal analyses have been known for at least forty years. − Additional information regarding evolved gas mixture components can be obtained by combining gas chromatography with mass spectrometry detection (GC/MS). − By using isothermal gas chromatography separations, GC/MS evolved gas sampling intervals of 1−2 min have been reported. ,− Somewhat longer sampling intervals (3−5 min) have been reported when temperature-programmed GC separations are required. ,, The assay cycle time required for repetitive GC/MS analyses depends on the length of time required for chromatographic separation and, when temperature programmed separations are employed, the time required to cool the chromatographic column back to the ramp starting temperature.…”

“…[3][4][5] Additional information regarding evolved gas mixture components can be obtained by combining gas chromatography with mass spectrometry detection (GC/MS). [6][7][8][9][10][11][12][13][14][15][16][17][18] By using isothermal gas chromatography separations, GC/MS evolved gas sampling intervals of 1-2 min have been reported. 11,[13][14][15] Somewhat longer sampling intervals (3-5 min) have been reported when temperature-programmed GC separations are required.…”

A Thermogravimetry−Capillary Gas Chromatography/Mass Spectrometry Interface

“…Although these analyzers provide structural information regarding volatiles generated during TG analysis, species-specific evolution profiles can only be obtained when mass spectral or infrared spectroscopic features can be correlated with individual substances in TG evolved gas mixtures. To facilitate species-specific analysis when unique spectroscopic features are unavailable, gas chromatographic separations − and tandem mass spectrometry have been employed with TG. Gas chromatographic separations have typically been used to separate TG effluent components that were cryogenically trapped during TG analysis.…”