Application and method of TGA-IR-GCMS triple machine in tobacco analysis

Abstract

The invention relates to an application and a method of a TGA-IR-GCMS triple machine (thermogravimetric analyzer-infrared spectrometer-gas chromatography mass spectrum) in tobacco analysis. A thermogravimetric-infrared-gas chromatography mass spectrum (STA-IR-GC-MS) triple machine is employed to perform thermogravimetry-infrared-gas chromatography mass spectrum analysis for components of cigarette smoke. A cigarette sample is placed in a thermogravimetric sample cup; high-purity nitrogen or an oxygen-nitrogen gas mixture is introduced into the thermogravimetric analyzer; preliminary determination of the structure is performed by purging pyrolysis products of the sample in such atmosphere by the gas into an online-detecting infrared spectrometer; then accurate qualitative determination of the cigarette sample is performed by purging the products by the gas into a GC-MS for detection; and pyrolysis products of different time points and temperature points are analyzed. The method of the invention has the characteristics of simple operation, rapid analysis speed, comprehensive detection and the like, can perform online detection, analysis and qualitative determination of the pyrolysis products of the cigarette, and provides a scientific and reliable analysis method for mechanism and principle research in aspects of cigarette additives, safety evaluation, harm reduction and tar reduction, etc.

Description

technical field [0001] The invention relates to the technical field of tobacco detection, in particular to the application and method of a TGA-IR-GCMS triplet (thermogravimetric-infrared-gas phase mass spectrometry) in tobacco analysis. Background technique [0002] At present, research on tobacco combustion detection mainly uses pyrolysis-gas chromatography mass spectrometry, thermogravimetry-infrared, thermogravimetry-gas chromatography mass spectrometry or offline capture, but the common data of several analysis methods cannot be collected online at the same time. Pyrolysis can simulate the combustion atmosphere of tobacco, but cannot analyze its thermogravimetric and heat flow changes, while thermogravimetric analysis can not only simulate the tobacco combustion atmosphere, but also obtain corresponding thermal analysis data. Thermogravimetry-mass spectrometry (TG-MS) technology has the advantages of good online linearity, convenience and quickness. While obtaining the i...

AI Technical Summary

Problems solved by technology

Thermogravimetry-mass spectrometry (TG-MS) technology has the advantages of good online linearity, convenience and quickness. While obtaining the information of sample thermogravimetric loss, it can monitor the escape behavior of volatile components during the pyrolysis process of the sample online, but it cannot Infrared data collected

Thermogravimetric-infrared combined technology (TG-FTIR) is a kind of combined infrared technology developed in the late 1980s, and after the first commercialization of TGA-FTIR by Nicolet Instrument Company of the United States in 1987, it has made great progress. Its pyrolysis products cannot be accurately qualitative

However, the existing TG-MS or TG-FTIR and other two-line systems can only collect the analysis results of thermogravimetry and mass spectrometry or the two-line analysis of thermogravimetry and infrared.

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