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Thermal analysis determination method for plant biomass lignin content

A plant biomass and determination method technology, which is applied in the field of detecting the lignin content of plant biomass by thermal analysis, can solve the problems of cumbersome detection steps and complicated operations, and achieves the effects of saving experimental steps, reducing environmental pollution and shortening experimental time.

Inactive Publication Date: 2015-12-30
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

Therefore, there is an urgent need to find a way to establish the relationship between anaerobic thermal parameters and lignin content of plant biomass by using thermogravimetric analysis and differential calorimetry scanning to solve the problems of cumbersome lignin detection steps and complicated operations.

Method used

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  • Thermal analysis determination method for plant biomass lignin content

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Embodiment 1

[0024] 1. Preparation of plant biomass samples: The analysis objects are pretreated plant samples (which can be divided into 4 categories: emergent plants, submerged plants, floating plants and terrestrial plants). That is, the collected plant samples are classified according to different parts such as roots, leaves, stems, etc., and they are killed at 90°C for 1 to 2 hours, and thoroughly dried at 60°C for 12 hours. After drying, they are ground and passed through a 1mm sieve, and then sealed and stored in a cool and dry place. place.

[0025] 2. DSC scanning experiment of plant biomass samples: 10 mg of pretreated plant samples were placed in a standard aluminum pan, and thermal analysis was performed by a differential calorimetry scanner (DSC) to obtain a DSC spectrum.

[0026] 3. Interpretation of DSC spectrum to obtain thermal indicators: such as figure 1 As shown, the DSC result file was opened with Universal Analysis 2000 software, and peakF5 was integrated with 450°C ...

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Abstract

The invention discloses a thermal analysis determination method for the plant biomass lignin content. The method comprises the following steps that 1, plant biomass samples are prepared; 2, the characterization parameter standard of slow pyrolysis of standard organic matter on the anaerobic condition is determined; 3, the characterization parameter standard of slow pyrolysis of natural plant biomass on the anaerobic condition is determined; 4, a DSC scanning experiment of the plant biomass samples is performed to obtain DSC thermograms of the characterization parameter standard of slow pyrolysis of the natural plant biomass on the anaerobic condition; 5, the DSC thermograms are interpreted to obtain thermal indexes; 6, the lignin content is calculated. According to the thermal analysis determination method for the plant biomass lignin content, a large number of the experimental steps are omitted, the experimental time is effectively shortened, the usage of acidized agentia is avoided, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a method for measuring lignin content, in particular to a method for detecting plant biomass lignin content by thermal analysis. Background technique [0002] Plant biomass is an important component of the surface environment and the main source of natural organic matter. However, its chemical composition is relatively complex and its characterization is difficult. Among them, lignin is an amorphous, aromatic polymer that widely exists in plants and contains oxyphenylpropanol or its derivatives in its molecular structure. It is one of the main components of plant tissues, accounting for about 15% to 30% of its chemical composition. [0003] At present, lignin analysis techniques mainly include Klason method, ultraviolet spectrophotometry, reversed-phase high-performance liquid chromatography, redox method, ammonolysis method, non-aqueous conductivity titration method, etc. The principle of the Klason method is to use concentr...

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Application Information

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IPC IPC(8): G01N25/00G01N1/28
Inventor 吴丰昌郭飞穆云松廖海清胡艳香宝白英臣钱峰
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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