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Method for determining equilibrium moisture content of tobacco leaf

A water content and balance technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve time-consuming and labor-intensive problems, achieve non-destructive analysis, suitable for batch testing, and rapid data acquisition technical support.

Inactive Publication Date: 2014-11-05
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the time-consuming and labor-intensive problems existing in measuring the equilibrium moisture content of tobacco leaves in the prior art, and provides a method for measuring the equilibrium moisture content of tobacco leaves

Method used

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  • Method for determining equilibrium moisture content of tobacco leaf
  • Method for determining equilibrium moisture content of tobacco leaf
  • Method for determining equilibrium moisture content of tobacco leaf

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the method for measuring the equilibrium moisture content of tobacco leaves in this example includes the following steps: (1) Take more than 30 pieces of flue-cured tobacco leaves, first rehydrate, draw stems, and then dry the flue-cured tobacco leaves in a blast drying oven at 35 ° C, dry Finally, the flue-cured tobacco leaves are crushed with a multi-functional grinder and passed through a 40-mesh sieve; (2) The sieved flue-cured tobacco leaf powder is placed in a constant temperature and humidity box with a temperature of (21-23) °C and a humidity of (57-63)%. (3) Take the flue-cured tobacco leaf powder balanced in step (2) and put it into the sample cup of the near-infrared spectrometer, so that the thickness of the flue-cured tobacco leaf powder sample spread in the sample cup is consistent, and the thickness is not less than 5mm , use the near-infrared spectrometer to scan the flue-cured tobacco leaf powder in the sample cup, and collect...

Embodiment 2

[0024] The method for measuring the equilibrium moisture content of tobacco leaves in this embodiment includes the following steps: (1) Take more than 30 pieces of C3F flue-cured tobacco leaves, first rehydrate, and draw stems, and then dry the flue-cured tobacco leaves in a blast drying oven at 40 ° C. After drying, Use a multi-functional pulverizer to crush the flue-cured tobacco leaves and pass through an 80-mesh sieve; (2) Put the sifted flue-cured tobacco leaf powder in a constant temperature and humidity box with a temperature of (21-23) °C and a humidity of (57-63)%. Balance for more than 48 hours; (3) Take the flue-cured tobacco powder balanced in step (2) and put it into the sample cup of the near-infrared spectrometer, so that the thickness of the flue-cured tobacco leaf powder in the sample cup is not less than 5mm, and the flue-cured tobacco leaf powder sample is in the sample cup. The thickness of the middle shop is consistent, and the near-infrared spectrum of the...

Embodiment 3

[0026] The method for measuring the equilibrium moisture content of tobacco leaves in this embodiment includes the following steps: (1) Take more than 30 pieces of X2F flue-cured tobacco leaves, first rehydrate, and draw stems, and then dry the flue-cured tobacco leaves in a blast drying oven at 45°C. After drying, Use a multi-functional pulverizer to crush the flue-cured tobacco leaves and pass through a 20-mesh sieve; (2) Put the sieved flue-cured tobacco leaf powder in a constant temperature and humidity box with a temperature of (21-23) °C and a humidity of (57-63)%. Balance for more than 48 hours; (3) Take the flue-cured tobacco leaf powder balanced in step (2) and put it into the sample cup of the near-infrared spectrometer, so that the thickness of the flue-cured tobacco leaf powder sample spread in the sample cup is consistent, and the thickness is not less than 5mm. The near-infrared spectrum of the flue-cured tobacco leaf powder in the sample cup was scanned by a near...

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Abstract

The invention discloses a method for determining equilibrium moisture content of tobacco leaf, which comprises the following steps: 1)removing stalk of tobacco leaf and drying under a proper condition, employing a multi-functional pulverizer for crushing, sieving the tobacco leaf powder; 2)placing a proper amount of tobacco leaf powder in a sample cup of a near-infrared spectroscopy, collecting its near infrared spectroscopy; 3)fitting the collected to the near infrared spectroscopy and the equilibrium moisture content of tobacco leaf determined by a baking oven method, establishing a corresponding mathematics model; and 4)using a near infrared prediction model of the equilibrium moisture content of tobacco leaf for analyzing near infrared spectroscopy of the unknown tobacco leaf so that equilibrium moisture content data of the sample can be obtained. The method has the advantages of simple operation, labour saving and time saving, and batch detection adaption, can realize rapid and nondestructive analysis of equilibrium moisture content of tobacco leaf, and provides simple and rapid data acquisition technology support for purchasing tobacco leaf, evaluating quality, and researching and developing the new product.

Description

technical field [0001] The invention relates to a method for measuring the equilibrium moisture content of tobacco leaves, in particular to a method for detecting the equilibrium moisture content of tobacco leaves by using near-infrared spectrum technology. Background technique [0002] The physical characteristics of tobacco leaves refer to some physical characteristics that affect the quality of tobacco leaves and technological processing. They are an important part of tobacco leaf quality. index. The equilibrium moisture content of tobacco leaves refers to the moisture content of tobacco when the moisture absorption and dehumidification reach an equilibrium state under certain temperature and humidity conditions. The moisture content of tobacco leaves is an extremely important value in its physical properties, which is closely related to the mechanical properties, burning rate and smoking quality of tobacco leaves. [0003] At present, the commonly used method for deter...

Claims

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Application Information

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IPC IPC(8): G01N21/359
Inventor 王建民李瑞丽杜阅光李永正孙意然
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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