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Method and device for realizing on-line analysis on simulated combustion of cigarettes by using thermogravimetric analyzer and GC/MS

A thermogravimetric analyzer and analysis method technology, applied in measurement devices, analysis materials, instruments, etc., can solve the problems of inaccurate qualitative and quantitative, low content of cracking products, and small sample consumption.

Active Publication Date: 2010-04-07
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are certain defects in the prior art: when using a thermal cracker, the amount of sample used is small (microgram level), and the content of the cracked product obtained by cracking is very low (order of magnitude: nanograms), and the cracked product obtained by thermal cracking enters GC / MS In addition, the pyrolysis atmosphere can only be an inert gas when using a pyrolysis instrument, so there is a big gap between the simulated cigarette combustion process and the actual cigarette combustion process

Method used

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  • Method and device for realizing on-line analysis on simulated combustion of cigarettes by using thermogravimetric analyzer and GC/MS
  • Method and device for realizing on-line analysis on simulated combustion of cigarettes by using thermogravimetric analyzer and GC/MS
  • Method and device for realizing on-line analysis on simulated combustion of cigarettes by using thermogravimetric analyzer and GC/MS

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Weigh 20 mg of cigarette powder powder sample that has been crushed through a 40-mesh sieve, put it into the crucible of the thermogravimetric analyzer, set the temperature rise rate of the sample on the thermogravimetric analyzer to be 10 / °C min, adjust the carrier gas flow rate (nitrogen 30mL / min , oxygen 10mL / min), connect the temperature-controllable transfer line (transfer line temperature 280°C), and start to heat up; the six-way valve starts to work, and the thermal weight loss product continuously passes through the temperature-controllable transfer line and the six-way valve into the PTV inlet. A sample was taken every 20 minutes, and the sample captured at the PTV inlet was analyzed according to the GC / MS analysis conditions.

[0034] See GC-MS spectrum ( Figure 5 , Image 6 ):

[0035] As can be seen from the figure above, using the device thermogravimetric analyzer and GC-MS of the invention can carry out simulated combustion experiments on cigarettes, an...

Embodiment 2

[0037] Weigh 50 mg of tobacco dust sample crushed through a 40-mesh sieve from cigarette shreds, put it into the crucible of the thermogravimetric analyzer, set the sample temperature rise program on the thermogravimetric analyzer to 40°C / min, adjust the carrier gas flow rate (nitrogen 35mL / min, Oxygen 5mL / min), connect the temperature-controllable transfer line (transfer line temperature 280 ℃), start to heat up; the six-way valve starts to work, and the thermal weight loss product continuously passes through the temperature-controllable transfer line and the six-way valve into the PTV inlet, every 20min A sample is taken, and the sample captured at the PTV inlet is analyzed according to the GC / MS analysis conditions.

[0038] See GC-MS spectrum ( Figure 7 , Figure 8 ):

[0039] As can be seen from the figure above, using the device thermogravimetric analyzer and GC-MS of the invention, it is possible to conduct simulated combustion experiments on cigarettes under differe...

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Abstract

The invention provides a method and a device for realizing on-line analysis on simulated combustion of cigarettes by using a thermogravimetric analyzer and a GC / MS and is characterized in that: the method comprises the following steps of: putting a cigarette sample in the thermogravimetric analyzer for programmable temperature rise cracking under a condition of inert gas or synthetic air, and sending thermal cracking products to a six-way valve by a controllable temperature transmission line; simultaneously, according to experimental requirements, selectively sending the cracking products at different temperature stages to a PTV sample injection opening by the six-way valve, separating the cracking products enriched by condensation of liquid nitrogen by the gas chromatography GC, and delivering the cracking products to the mass spectrometry for quantitative and qualitative analysis; and simulating conditions of the combustion of cigarettes, completing cracking experiments of gram-class cigarette samples at different temperature-rise speed and with different oxygen contents.

Description

technical field [0001] The invention relates to a method for detecting chemical components of tobacco. Specifically, a thermogravimetric analyzer and GC / MS (gas chromatography-mass spectrometry) are used to detect tobacco samples on-line to realize on-line analysis of simulated combustion experiment products of cigarettes. Background technique [0002] The burning process of cigarettes is a very complicated physical and chemical reaction process. The burning of cigarettes will produce chemical components. Some of these components are distilled and volatilized, some are produced by combustion and decomposition, and some are produced by chemical reactions. of. [0003] In the prior art, pyrolyzers and thermogravimetric analyzers are generally used to simulate the combustion process of cigarettes, so as to understand the precursors of aroma components and harmful chemical components. The pyrolysis instrument analyzes the high-temperature pyrolysis behavior of tobacco, which ha...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N30/00
Inventor 王洪波郭吉兆郭军伟彭斌胡斌赵阁谢复炜张晓兵
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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