Method for rapidly measuring chemical compositions of wood by utilizing near infrared spectroscopic analysis technique

A near-infrared spectroscopy and chemical composition technology is applied in the field of rapid determination of wood chemical composition by using near-infrared spectral analysis technology, which can solve the problems of consuming a lot of manpower, material resources, financial resources and time, and achieve the effect of rapid technical data support

Inactive Publication Date: 2011-09-21
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of consuming a large amount of manpower, material resources, financial resources, time and certain impact on the environment in the ana

Method used

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  • Method for rapidly measuring chemical compositions of wood by utilizing near infrared spectroscopic analysis technique
  • Method for rapidly measuring chemical compositions of wood by utilizing near infrared spectroscopic analysis technique
  • Method for rapidly measuring chemical compositions of wood by utilizing near infrared spectroscopic analysis technique

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Embodiment Construction

[0020] Collect about 1000g of wood chips from 120 kinds of hardwood and coniferous wood samples. After air-drying, put each wood chip into a raw material crusher and grind them into fine powder. powder, and then put the wood powder samples into clean sealed plastic bags, after balancing the moisture, measure the chemical composition of wood by conventional methods and use near-infrared spectrometer at 12500-3600cm -1 Near-infrared spectral data are collected in the spectral range.

[0021] The partial least squares method in the chemometric method was used to establish the wood mathematical models corresponding to the measured values ​​of various chemical components of wood and their near-infrared spectral data, and the model was optimized to remove some abnormal samples, so that the coefficient of determination (R 2 ) reached more than 0.93, the cross-validation root mean square deviation (RMSECV) was equivalent to the error of conventional analysis methods, and the residual ...

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Abstract

The invention discloses a method for rapidly measuring chemical compositions of wood by utilizing a near infrared spectroscopic analysis technique, and the method can be used for solving the problems of high cost and long period when the existing method is used for analyzing and measuring the chemical compositions of the wood, has the advantages of simplicity, convenience, practicability, rapidness and the like, and can be used for effectively, rapidly and accurately analyzing and measuring the chemical compositions of the wood and the like. The method disclosed by the invention comprises the following steps: a. crushing wood chips and sieving through a sieve of 40-60 meshes; b. measuring the chemical compositions of the wood by utilizing a conventional analysis method; c. collecting the near infrared spectroscopic data of a wood sample by utilizing a near infrared spectroscopic analysis instrument; d. respectively establishing corresponding wood teaching prediction models of various chemical composition measured values of the wood and the near infrared spectroscopic data of the wood by adopting a chemical metering method; and e. analyzing the wood near infrared spectroscopic data of the unknown chemical compositions which are collected according to the step c by adopting the established mathematical prediction model, thereby rapidly and accurately determining the chemical compositions of the wood.

Description

technical field [0001] The invention relates to a method for determining chemical components of wood, in particular to a method for rapidly determining chemical components of wood by using near-infrared spectrum analysis technology. Background technique [0002] As we all know, in order to make better use of papermaking wood for pulping and papermaking, it is necessary to obtain the properties of wood accurately, quickly and extensively. However, the traditional wood property evaluation methods generally need to consume a lot of manpower, material resources, financial resources, time and have a certain impact on the environment. Therefore, seeking a fast and accurate method for evaluating the chemical composition of wood has become one of the important contents of pulp and paper scientific research. [0003] Near Infrared Spectroscopy (NIRS for short) analysis technology uses the mathematical relationship established between the near-infrared characteristic absorption peak ...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N21/3563G01N21/359
Inventor 贺文明薛崇昀聂怡
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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