A method for analyzing the composition of humic substance-like functional groups with different molecular weights

A humic substance and functional group technology, which is applied in the direction of analyzing materials, measuring devices, and material separation, can solve the problems of large labor load, high sample demand, and inconvenient composition, so as to achieve less sample demand, reduce pollution, and sample volume little effect

Inactive Publication Date: 2016-03-16
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Application Information

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Problems solved by technology

However, this analysis method not only has a high demand for samples and a large amount of labor, but also takes a long time for processing and analysis. It cannot conveniently and quickly determine the composition of organic substances with different molecular weights in humic substances, especially cannot effectively determine the composition characteristics of functional groups of humic substances with different molecular weights.
[0004] Modern chromatographic analysis technology provides a technical basis for the grouping of humic substances by molecular weight. Humic substances can be grouped according to molecular weight through high-efficiency size exclusion chromatography. cannot effectively identify the functional group composition of different molecular weight humic substances

Method used

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  • A method for analyzing the composition of humic substance-like functional groups with different molecular weights
  • A method for analyzing the composition of humic substance-like functional groups with different molecular weights
  • A method for analyzing the composition of humic substance-like functional groups with different molecular weights

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Embodiment 1

[0039] Organic matter extraction: Collect 5 samples at different composting stages, numbered S1, S2, S3, S4, S5 respectively, add ultrapure water, extract and shake for 16 hours, centrifuge the supernatant and pass through a filter membrane with a pore size of 0.45 μm , the filtrate was collected, a part was stored at 4°C, and a part was lyophilized into solid powder.

[0040] Infrared spectrum scanning: Mix the above five solid powder samples with spectrally pure KBr and press them into tablets, and scan the 4000-400cm -1 Infrared spectra in the range, and then convert its data to absorption spectrum mode, save 5 samples in a file in the order of S1-S5 in csv data format.

[0041] Adjust filtrate concentration: use ultrapure water to adjust the DOC concentration of 5 compost samples to make DOC=5mgL -1 ,spare.

[0042] Three-dimensional fluorescence spectrum scanning of the filtrate: adjust the above 5 to DOC=5mgL -1 The sample is subjected to three-dimensional fluorescenc...

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Abstract

The invention relates to a method for analyzing composition of humic-like functional groups with different molecular weights. The method comprises the following main steps: A) sample collection and extraction of organic matters; B) infrared spectrum scanning; C) adjustment of filter liquor concentration; D) three-dimensional fluorescence spectrum scanning of filtrate; E) determination of position of a humic-like peak; F) chromatogram scanning; G) two-dimensional heterogeneous related spectral analysis; and H) determination of composition of humic-like functional groups with different molecular weights. The method provided by the invention can be used for determining the composition of humic-like functional groups with different molecular weights and is efficient in analysis and small in demand on samples.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and recycling, and in particular relates to a method for combining infrared spectroscopy and high-efficiency size exclusion chromatography to analyze the functional group composition of humic substances with different molecular weights in organic waste. Background technique [0002] Humus-like substances are the products of humification and stabilization in the process of organic waste treatment and disposal, and the composition and structure of humus-like substances are closely related to the stability of organic waste. The more humus-like substances synthesized in the process of organic waste treatment, the larger the molecular weight and the higher the content of benzene ring functional groups, the more difficult it is for microorganisms to use, and the more stable the organic waste is. The analysis of the molecular weight of humic substances and the composition of humic substance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 何小松席北斗高如泰李丹赵昕宇袁英余红
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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