Method for determining content of chemical composition of lignocellulose plant by adopting thermogravimetric analysis meter

A technology of lignocellulose and thermogravimetric analysis, applied in the direction of measuring devices, analysis materials, instruments, etc., can solve the problems of increasing analysis costs and the burden of analysis and testing personnel, inability to analyze a small amount of samples, and untimely analysis results, etc., to achieve the test The effect of low cost, simple operation and low manpower requirement

Active Publication Date: 2017-01-11
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This analysis alone requires 1-2 analysts and testers to work throughout the year, and due to the long analysis cycle, the untimely analysis results often affect the production of the factory
In addition, for the test and analysis of a sample, it needs to consume about 20

Method used

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  • Method for determining content of chemical composition of lignocellulose plant by adopting thermogravimetric analysis meter
  • Method for determining content of chemical composition of lignocellulose plant by adopting thermogravimetric analysis meter
  • Method for determining content of chemical composition of lignocellulose plant by adopting thermogravimetric analysis meter

Examples

Experimental program
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Example Embodiment

[0062] Example 1

[0063] Take wood raw materials as an example

[0064] Sixty parts of wood raw materials were selected, of which: 25 parts were from Linyi, Shandong, 15 parts were from Guiyang, Guizhou, and 20 parts were from Changsha, Hunan; samples were made separately, each weighing 50g.

[0065] All samples were dried at 105°C, crushed, passed through a 40-mesh sieve to obtain sample powder, each sample is about 30g, and then divided into two parts, one part (20mg) for thermogravimetric analysis, the other (30g) for wet chemical analysis ;

[0066] Such as figure 1 As shown, the calibration sample set and the thermogravimetric curve collection of the sample to be tested: Weigh about 20mg of the sample, put it into the thermogravimetric analyzer for thermogravimetric analysis, and collect the thermogravimetric curve. The heating program is set as follows: the sample starts at room temperature 20℃ , The temperature is raised at 5°C / min, the temperature is raised to 900°C to stop ...

Example Embodiment

[0080] Example 2

[0081] Taking the kenaf plant as an example, 80 parts of kenaf raw materials are selected, among which 40 parts are produced in Hunan, 20 parts are produced in Shandong, and 20 parts are produced in Xinjiang; samples are made separately, and each sample weighs 50g.

[0082] All samples were dried at 105°C, crushed, passed through a 40-mesh sieve to obtain sample powder, each sample is about 30g, and then divided into two parts, one part (20mg) for thermogravimetric analysis, the other (30g) for wet chemical analysis ;

[0083] Such as figure 1 As shown, the calibration sample set and the thermogravimetric curve collection of the sample to be tested: Weigh about 20mg of the sample, put it into the thermogravimetric analyzer for thermogravimetric analysis, and collect the thermogravimetric curve. The heating program is set as follows: the sample starts at room temperature 20℃ , The temperature is raised at 5°C / min, the temperature is raised to 900°C to stop the temp...

Example Embodiment

[0088] Example 3

[0089] Taking corn plants as an example, 120 parts of corn stalk raw materials are selected, among which 40 parts are produced in Gaomi, Shandong, 40 parts are produced in Liaocheng, Shandong, and 40 parts are produced in Dezhou, Shandong; samples are made separately, and the weight of each sample is 50g.

[0090] All samples were dried at 105°C and crushed and passed through a 40-mesh sieve to obtain sample powder. Each sample is about 30g, and then divided into two parts, one part (20mg) for thermogravimetric analysis, and the other (30g) for wet chemical analysis ;

[0091] Such as figure 1 As shown, the calibration sample set and the thermogravimetric curve collection of the sample to be tested: Weigh about 20mg of the sample, put it into the thermogravimetric analyzer for thermogravimetric analysis, and collect the thermogravimetric curve. The heating program is set as follows: the sample starts at room temperature 20℃ , The temperature is raised at 5°C / min,...

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Abstract

The invention relates to a method for determining content of a chemical composition of a lignocellulose plant by adopting a thermogravimetric analysis meter. The method comprises the following steps: performing programmed temperature rise treatment on a corrected sample set by adopting the thermogravimetric analysis meter, thereby acquiring a thermogravimetric curve of the corrected sample set; determining a target index content of the corrected sample set according to a standard method and taking the target index content as a reference value; combining the thermogravimetric curve of the corrected sample set with the reference value by adopting a partial least squares method to establish a correcting model; substituting the thermogravimetric curve of a to-be-determined sample into the correcting model and calculating, thereby acquiring the target index content of the to-be-determined sample. Compared with the conventional wet chemical analysis, the method provided by the invention has the characteristics of short time, high speed, accurate analysis result, less quantity demand of the sample, and the like. According to the method provided by the invention, the problems of complex steps, long time, high cost and low efficiency of the traditional analysis method can be effectively solved, and the microanalysis and batch-analysis can be performed.

Description

technical field [0001] The invention relates to a mathematical model related to the content of phytochemical components and their thermogravimetric curves obtained through stoichiometric modeling in the process of analyzing lignocellulose phytochemical components, using this model to analyze the thermogravimetric curves of samples to be tested, quickly A method for obtaining the content of its chemical components, the analysis method requires less samples, and the analysis is fast and accurate, and belongs to the field of analysis and testing of lignocellulosic plants. Background technique [0002] The determination of the chemical composition of lignocellulosic plants is a necessary prerequisite for the rational use of plant resources, the correct evaluation of their use value and processing methods, and their effective application in textile hemp degumming, paper pulping, and bioethanol fermentation pretreatment. [0003] Conventional phytochemical component content testin...

Claims

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Application Information

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IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 姜伟韩光亭周成凤张元明邢美毅
Owner QINGDAO UNIV
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