Method for selecting spectrum scope in tobacco water-soluble sugar near infrared quantification model

A water-soluble sugar and spectral range technology, which is applied in the field of physical and chemical testing of tobacco and tobacco products, can solve the problems of no spectral range, obvious differences in quantitative results, and analysis results that are easily affected by various factors.

Active Publication Date: 2014-11-19
CHINA TOBACCO ZHEJIANG IND
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Problems solved by technology

[0003] In recent years, near-infrared spectral analysis technology has been widely used in the tobacco industry, but this technology uses chemometric methods to extract useful sample content information from complex spectral backgrounds, so its analysis results are vulnerable to va

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  • Method for selecting spectrum scope in tobacco water-soluble sugar near infrared quantification model
  • Method for selecting spectrum scope in tobacco water-soluble sugar near infrared quantification model
  • Method for selecting spectrum scope in tobacco water-soluble sugar near infrared quantification model

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Experimental program
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Embodiment Construction

[0021] 1) Collect 700 flue-cured tobacco leaf samples and prepare powder samples according to the tobacco industry standard "YC / T 31-1996 Tobacco and Tobacco Products Sample Preparation and Moisture Determination Oven Method", of which 600 are used as modeling sample sets, and 100 as an external validation sample set.

[0022] 2) According to the tobacco industry standard "YC / T 159-2002 Continuous Flow Method for Determination of Water-Soluble Sugar in Tobacco and Tobacco Products", the content of water-soluble total sugar and reducing sugar in all samples was determined.

[0023] 3) All samples were preheated for 1 hour to collect diffuse reflectance spectra by rotating the sample cup on the Fourier transform near-infrared spectrometer. Each sample was scanned 64 times, and the spectral collection range was 3800-10000cm -1 , with a spectral resolution of 8 cm -1 .

[0024] 4) Molecular structure analysis of water-soluble sugar in tobacco.

[0025] The water-soluble sugars ...

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Abstract

The invention relates to a method for selecting spectrum scope in tobacco water-soluble sugar near infrared quantification model. Through research of a molecule structure of water-soluble sugar, synthesis frequency and frequency multiplication absorption scope at a near infrared spectrum of hydrogen containing group in the water-soluble sugar can be deduced, an interaction verification correlation coefficient and interaction verification mean square deviation of a near infrared model are taken as evaluation indexes for further optimization, and optimum spectrum scope of tobacco water-soluble sugar when the near infrared quantification model is established can be finally determined. Three different spectrum scopes are used for establishing the near infrared quantification model of tobacco water-soluble total sugar and reducing sugar, and then a comparison is carried out. A)a whole spectrum scope is 3800-10000cm<-1>; B)a spectrum scope is selected through automatic optimization by TQ Analyst; and C)the spectrum scope is determined through molecular structure analysis. According to the data, the evaluation index of the model is obviously better than other two methods through the molecular structure analysis.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical testing of tobacco and tobacco products, and mainly relates to the technical field of chemical composition determination of tobacco and tobacco products, in particular to a method for selecting a spectral range in a near-infrared quantitative model of tobacco water-soluble sugar. Background technique [0002] The water-soluble sugar in tobacco has an important impact on the quality of tobacco leaves and is the main factor determining the alcohol and degree of smoke. In the tobacco industry, the analysis and determination of water-soluble sugar content is of great significance to the quality control of finished cigarettes. [0003] In recent years, near-infrared spectral analysis technology has been widely used in the tobacco industry, but this technology uses chemometric methods to extract useful sample content information from complex spectral backgrounds, so its analysis results ar...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N21/359
Inventor 夏骏朱书秀陆明华陆扬苏燕潘力林垦张卫平蒋健
Owner CHINA TOBACCO ZHEJIANG IND
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