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Method for fast testing contents of chemical ingredients in Eucalyptus urophylla*E. tereticornis wood

A rapid determination and chemical composition technology, applied in the field of wood science, can solve the problems of predicting other tree species, spectral processing methods and spectral effective band ranges, etc., to achieve enhanced accuracy, accurate and reliable chemical composition content, and rapid measurement of chemical composition. The effect of content

Inactive Publication Date: 2017-02-08
RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] However, there is no report on the use of near-infrared spectroscopy to predict the content of wood chemical components of Eucalyptus urocarpa, an excellent wood and pulping tree species, and in view of the differences in growth characteristics and adaptability of each tree species, even if using The same model of near-infrared instruments has significantly different analysis models for each trait index of the same tree species, and the spectral processing method and effective spectral band range of each trait index or component are also different. Therefore, it is not possible to simply use a tree species A near-infrared spectrum model is used to predict other tree species. Therefore, a method for quickly determining the chemical composition content of Eucalyptus eucalyptus is needed to fill the gap in this research

Method used

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  • Method for fast testing contents of chemical ingredients in Eucalyptus urophylla*E. tereticornis wood
  • Method for fast testing contents of chemical ingredients in Eucalyptus urophylla*E. tereticornis wood
  • Method for fast testing contents of chemical ingredients in Eucalyptus urophylla*E. tereticornis wood

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Embodiment 1

[0048] like Figure 1-6 As shown, a method for determining the content of chemical components in Eucalyptus eucalyptus wood, including building a model as follows:

[0049] 1) Sample sampling: 80 standing trees with normal growth and no obvious defects were selected in the 10-year-old Eucalyptus test forest, and they were divided into 68 plants in A part and 12 plants in B part, and drilled with an electric drill at a tree height of 1.2-1.4 meters. Take the peeled fresh sawdust sample 15-20g / plant, the drilling depth is less than 4cm, put the sawdust in a kraft paper envelope bag and bring it back, and let it dry naturally in an air-conditioned room at 24°C for 15-20 days, so that the water content of the sawdust can reach a natural balance ;

[0050] 2) Sample crushing and near-infrared spectrum collection: The air-dried wood chip samples were ground into wood powder with a sample grinder and sieved, and the wood powder with 40-60 mesh sieves was selected, and used in a room...

Embodiment 2

[0066] A method for quickly measuring cellulose, hemicellulose and lignin content of Eucalyptus eucalyptus wood, the steps are as follows:

[0067] 1) Sample sampling: 15 live standing trees with normal growth and no obvious defects were selected in the 11-year-old Eucalyptus eucalyptus test forest, and the fresh sawdust samples after removing the bark were drilled with an electric drill at a trunk height of 1.3m (diameter at breast height) 15-20g / plant, the drilling depth is less than 4cm, put the sawdust into a kraft paper envelope bag and bring it back, and put it in an air-conditioned room at 24°C to dry naturally for 15-20 days, so that the water content of the sawdust can reach a natural balance.

[0068] 2) Sample crushing and near-infrared spectrum collection: The air-dried wood chip samples were ground into wood powder with a sample grinder and sieved, and the wood powder that had passed through a 40-60 mesh sieve was used in a room with a constant temperature of 24 °C...

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Abstract

The invention discloses a method for fast testing the contents of chemical ingredients in Eucalyptus urophylla*E. tereticornis wood. According to the method, a mathematical model is built by using the existing near infrared spectral feature absorption peak of an Eucalyptus urophylla*E. tereticornis wood sample and the relationship between contents of each chemical ingredient, and the goal of fast testing the content of other wood chemical ingredients to be tested in Eucalyptus urophylla*E. tereticornis wood is achieved. The method comprises the following steps of (1) sample sampling; (2) sample crushing and near infrared spectrum collection; (3) sample wood chemical ingredient standard measurement; (4) spectrum treatment and modeling; (5) model inspection; (6) model application. The method for fast testing the contents of ingredients of cellulose, hemicelluloses and lignin of the Eucalyptus urophylla*E. tereticornis wood has the advantages that the implementation is simple, convenient and fast; the accuracy and the reliability are high; the test cost can be obviously reduced; the tree damage and the chemical medicine consumption are reduced, so that the goal of testing the contents of the chemical ingredients in a great amount of Eucalyptus urophylla*E. tereticornis wood can be achieved.

Description

technical field [0001] The invention relates to the field of wood science, in particular to a method for rapidly measuring the contents of cellulose, hemicellulose and lignin in Eucalyptus eucalyptus wood. Background technique [0002] Eucalyptus urophylla is an excellent hybrid obtained by crossing Eucalyptus urophylla and E.tereticornis. After nearly 20 years of popularization and application, it has been planted on a large scale in Guangdong, Guangxi, Fujian and Guizhou. It has the characteristics of fast growth, straight and round trunk, strong adaptability and stress resistance, especially strong wind and cold resistance, and good fiber shape. It is mainly used in construction and pulp and paper industries. As a common chemical component of pulping materials, the cellulose content is the key to evaluating the value of raw materials. An appropriate amount of hemicellulose can improve the bonding strength of paper sheets. There are chromogenic groups in lignin, and its co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/3563
CPCG01N21/359G01N21/3563G01N2021/3129G01N2021/3572
Inventor 甘四明翁启杰李发根周长品李梅杨合宇
Owner RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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