Method for detecting residual expansion medium in cut tobacco

A shredded tobacco and medium technology, applied in the field of detection and analysis

Active Publication Date: 2019-04-05
CHINA TOBACCO GUIZHOU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the residue detection of using KC-2A as a new expansion medium for cut tobacco

Method used

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  • Method for detecting residual expansion medium in cut tobacco
  • Method for detecting residual expansion medium in cut tobacco
  • Method for detecting residual expansion medium in cut tobacco

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Weigh 0.5g (accurate to 0.001g) of the expanded cut tobacco sample in a 20mL headspace bottle, add 1mL cyclohexane, quickly press the bottle cap, put it into the headspace sampler of the automatic headspace instrument, and then put the The obtained headspace gas was measured by gas chromatography-mass spectrometry.

[0065] SHS-GC / MS (Static Headspace-Gas Chromatography-Mass Spectrometry) was used to conduct quantitative analysis and detection of the expansion medium KC-2A in shredded tobacco by external standard method, and the detection conditions were as follows:

[0066] Static headspace detection:

[0067] Sample equilibration temperature: 60°C; sample loop temperature: 120°C; transfer line temperature: 140°C; sample equilibration time: 15min; sample bottle pressurization pressure: 35psi; carrier gas pressure: 40psi; 0.20min; sample loop equilibration time: 0.05min; injection time: 0.1min.

[0068] Gas chromatography detection:

[0069] Chromatographic column: H...

Embodiment 2

[0075] The 70 μg / mL KC-2A medium standard solution was added to the unexpanded shredded tobacco, and the equilibration temperature was 60°C, and the equilibration time was measured for 10min, 15min, 20min and 30min respectively, and other detection conditions were the same as in Example 1. Measurement results such as figure 1 shown. Depend on figure 1 It can be seen that the medium KC-2A response chromatogram peak area equilibrium time increased slightly from 10min to 15min, decreased slightly between 15min and 20min, and basically had no difference between 20min and 30min. Since the medium KC-2A has a low boiling point and is volatile, the relative equilibration time has little influence. In order to fully equilibrate the sample to be tested, 15min is the best equilibration time.

Embodiment 3

[0077] Add 70 μg / mL of KC-2A medium standard solution to unexpanded shredded tobacco, and measure at equilibrium temperatures of 40°C, 50°C, 60°C, and 80°C at an equilibrium time of 15 minutes, and other detection conditions are the same as in the examples 1. Test results such as figure 2 shown by figure 2 It can be seen that with the increase of equilibrium temperature, the peak area of ​​KC-2A medium increases gradually, and the growth rate is slightly smaller at 40-60 °C, but the growth rate is obvious at 60-80 °C. Usually, the expansion medium KC-2A in expanded tobacco shreds is detected at room temperature. 2A residue, and the medium KC-2A has a low boiling point, taking into account the full volatilization of the sample medium KC-2A, as well as the requirements of improving the sensitivity of the method and reducing the interference of the sample matrix, the best equilibrium temperature is 60°C.

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Abstract

The invention provides a method for detecting a residual expansion medium in cut tobacco, comprising the following steps: performing static headspace-gas chromatography-mass spectrometry coupling detection after mixing the expanded cut tobacco sample and cyclohexane, and analyzing the KC-2A content in the expanded cut tobacco sample. The method, based on the chemical characteristics of a low boiling point and easy volatilization of KC-2A medium and the characteristics of static headspace-gas chromatography (SHS-GC) technology, establishes a fast and accurate static headspace-gas chromatography-mass spectrometry to determine the residual of the expansion medium in the cut tobacco, which provides technical support for improving the use technology of the new expansion medium KC-2A and improving the smoking quality of the cigarette.

Description

technical field [0001] The invention relates to the technical field of detection and analysis, in particular to a method for detecting residual expansion medium in shredded tobacco. Background technique [0002] In recent years, with the promotion of “coke reduction and harm reduction” and “cost reduction and efficiency increase” in the tobacco industry, the usage of expanded shredded tobacco and cut stems is also increasing, mainly due to the strong filling capacity of expanded shredded tobacco or cut stems. , good combustion performance, obvious effects of tar reduction and harm reduction, etc. Its use in cigarette formulations can not only reduce the consumption of shredded tobacco in a single box of cigarettes, but also reduce the tar release of cigarettes. Therefore, tobacco expansion technology has always been a priority in the tobacco industry. As one of the important research fields, researchers at home and abroad have conducted in-depth research on tobacco expansion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 姬厚伟刘剑惠非琼黄淼王芳黄锡娟杨敬国韩伟邓葵
Owner CHINA TOBACCO GUIZHOU IND
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