Method for determining content of cut stem in cut tobacco based on thermal analysis technique

A technology of thermal analysis and thermogravimetric analyzer, which is used in measuring devices, analytical materials, instruments, etc., and can solve the problems of small sample discrimination, poor repeatability, and insufficient to measure the content of cut tobacco stems.

Active Publication Date: 2017-10-20
ZHENGZHOU TOBACCO RES INST OF CNTC +3
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  • Abstract
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  • Application Information

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Problems solved by technology

At the same time, differences in conventional chemical components of tobacco raw materials (total sugar, reducing sugar, total nitrogen, potassium, chlorine, etc.), elemental differences (carbon hydrogen oxygen nitrogen sulfur) or industrial analysis differences (moisture, fixed carbon, volatile matter and Ash content), etc., due to the problem of the test method, there are problems of small sample discrimination and poor repeatability in the measurement process, which are not enough to achieve the purpose of measuring the content of cut stems in shredded tobacco

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  • Method for determining content of cut stem in cut tobacco based on thermal analysis technique
  • Method for determining content of cut stem in cut tobacco based on thermal analysis technique
  • Method for determining content of cut stem in cut tobacco based on thermal analysis technique

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, operating process and principle of the present invention are further described:

[0023] The samples are the shredded leaves and the shredded stalks that are planned to be blended into a certain brand of domestic flue-cured tobacco cigarettes;

[0024] 1. Manually weigh a certain amount of formula shredded leaves and shredded stems, grind them into powder with a pulverizer, then transfer the above shredded leaves and shredded stems to an oven and dry them at 100°C for 2 hours. After drying, Blend the shredded leaf powder and the shredded stem powder according to the set blending ratio to obtain shredded tobacco samples with different shredded stem contents, and record the set shredded stem content values. The blending results are as follows:

[0025]

[0026] 2. Use a thermogravimetric analyzer for pyrolysis curve analysis. The purge gas is high-purity nitrogen, and the purge gas rate is 20mL / min. Each injection is abou...

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Abstract

The invention discloses a method for determining content of cut stem in cut tobacco based on a thermal analysis technique. The method comprises selecting pyrolysis conditions in a thermogravimetric analyzer, acquiring a weight change curve of multiple cut tobacco samples having known cut stem contents in the temperature programming process, analyzing a sample pyrolysis curve to find an instantaneous mass fraction value having obvious difference of the sample at a certain temperature or a temperature range having large sample pyrolysis curve difference, carrying out corresponding data processing and linear fitting to obtain a cut stem content standard curve equation, testing an unknown sample, and substituting the data into the equation to realize determination of the cut stem content in a cut tobacco sample. Because of the difference of chemical composition and properties of cut stem and cut tobacco, pyrolysis behaviors have difference so that the thermogravimetric analyzer can acquire mass change curves of different samples in the temperature programming process. Through difference analysis of the pyrolysis curve, the cut stem content of the cut tobacco is obtained.

Description

technical field [0001] The invention relates to a method for determining the content of shredded stems in shredded tobacco based on thermal analysis technology. Specifically, the pyrolysis conditions are selected in a thermogravimetric analyzer, the weight change curve is obtained in the process of temperature programming, and the pyrolysis curves of different shredded tobacco samples are analyzed. The method for analyzing the difference of the cut tobacco and obtaining the content of cut stems in shredded tobacco belongs to the field of quality inspection of cigarettes and cigarette products in process. Background technique [0002] The determination of cut stem content in shredded tobacco is the key to judging and evaluating the cut stem content in shredded tobacco of cigarettes and the blending quality of shredded stems in shredded cigarettes. The raw materials used in cigarettes are generally blended from shredded leaves, cut stems, expanded shredded tobacco and reconsti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 李斌蔡佳校何邦华张同琢刘泽李跃锋李巧灵谢国勇张柯王乐邓楠王兵
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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