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Detection method and device of natural organic matter aromaticity

A detection method and organic matter technology, which is applied in the direction of chemiluminescence/bioluminescence, and analysis by making materials undergo chemical reactions, can solve the problems of large sample volume, limited applicability, and complicated pretreatment process, and achieve small sample volume , Simple equipment and fast detection speed

Active Publication Date: 2019-08-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These indicators or methods have limited applicability, for example, UV absorption and fluorescence spectra are only applicable to DOM samples; a large amount of samples is required, and the pretreatment process is complicated, such as 13 C NMR and humic acid extraction method

Method used

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  • Detection method and device of natural organic matter aromaticity
  • Detection method and device of natural organic matter aromaticity
  • Detection method and device of natural organic matter aromaticity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094]Using the above-mentioned detection device and detection method, PMS (0, 0.05mol / L, 0.1mol / L, 0.15mol / L, 0.2mol / L, 0.25mol / L, 0.3mol / L, 0.35mol / L, 0.4mol / L), different concentrations of H 2 o 2 (0, 0.02mol / L, 0.05mol / L, 0.1mol / L, 0.2mol / L, 0.3mol / L, 0.4mol / L, 0.5mol / L, 0.6mol / L, 0.7mol / L, 0.8mol / L, 0.9mol / L, 1mol / L) and different concentrations of NaOH solutions (0, 0.5mol / L, 0.75mol / L, 1mol / L, 1.5mol / L, 2mol / L), and different flow rates (5μL / s, 10μL / s, 12μL / s, 15μL / s, 20μL / s, 25μL / s, 30μL / s, 40μL / s, 50μL / s, 60μL / s) optimize the experimental conditions, and finally determine 0.3mol / L PMS (such as figure 2 shown), 0.4mol / L H 2 o 2 (Such as image 3 shown) and 1.0mol / L NaOH (as Figure 4 shown), and a flow rate of 50μL / s (carrier flow path, cooperative oxidation flow path, oxidation flow path) (such as Figure 5 shown) is the best condition. h 2 o 2 The addition of NaOH-persulfate system significantly promotes the oxidation efficiency of the NaOH-persulfate...

Embodiment 2

[0096] Oxidative Chemiluminescence of Dissolved Organic Matter (DOM), Fulvic Acid (FA) and Humic Acid (HA) from Several Different Sources

[0097] The inventors studied a series of standard DOM, fulvic acid (FA) humic acid (HA) samples purchased from the International Humic Acid Society (IHSS), including Suwannee River Fulvic Acid Standard Samples I and II Suwannee River Fulvic AcidStandard I and II (SRFA, 1S101F and 2S101F), Suwannee River Humic Acid Standard II (SRHA, 2S101H), Nordic Aquatic Fulvic Acid Reference (NAFA, 1R105F), Suwannee River Natural Organic Matter II Suwannee River NOM II (SRNOM, 2R101N ), Upper Mississippi River NOM (MNOM), Pahokee Peat Fulvic Acid Sample IIPahokee Peat Fulvic Acid Standard II (PFA, 2S103F), Pahokee Peat Humic Acid Sample PahokeePeatHumic Acid (PHA, 1S103H), and weathered lignite rot Polyacid standard sample LeonarditeHumic AcidStandard (LHA, 1S104H). For a sample, there is a very good correlation between the chemiluminescence value and ...

Embodiment 3

[0099] In order to verify the feasibility of directly analyzing soil samples, we selected 9 standard soil samples for research. Weigh a certain amount of soil sample (ground through a 100-mesh sieve), add a certain amount of 0.1mol / L NaOH solution, and prepare soil suspensions with different concentrations (100-500mg soil / L), vortex and ultrasonically disperse for 5min, use analyzed by the aforementioned method. For a soil, there is a good linear correlation between the soil content and the oxidative luminescence value (r 2 >0.99), but the slopes are inconsistent among different soils. The oxidation luminescence value (S OCL ) There is a good linear correlation between this value and soil TOC (r 2 =0.978, such as Figure 8 Shown), indicating that the oxidative luminescence of soil samples comes from soil organic matter, and this method can also be used to quickly analyze the total organic mass of soil. Compared with traditional methods, this method has higher sensitivity a...

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Abstract

The invention discloses a detection method and device of natural organic matter aromaticity. The detection method comprises the steps that a quantitative sample solution is mixed with a carrier solution, the carrier solution is used for providing an alkaline environment for the sample solution; the mixed solution is mixed with an oxidant solution, and the oxidant solution is used for oxidizing thesample solution; and the obtained mixture is detected by adopting a detection unit. The detection method and the detection device have the advantages of simple equipment, low cost, less sample quantity, high sensitivity, high detection speed, high detection flux and the like, and are suitable for the evaluation of NOM aromaticity or humification in natural water, soil and sediment.

Description

technical field [0001] The invention belongs to the field of detecting the degree of aromatization of natural organic matter, and in particular relates to a method and a device for detecting the degree of aromatization of natural organic matter. Background technique [0002] Natural organic matter (NOM) is a general term for natural organic matter produced by physical, chemical, and biological decomposition of biological residues, biological secretions, or biological residues. NOM is widely distributed in the atmosphere, water and soil, and has important environmental geochemical significance. Sugars and lipids in organic matter are easily utilized by microorganisms and eventually mineralized and transformed into CO 2 , but some substances such as lignin, polyphenols, and tannins are not easily utilized by microorganisms, and can undergo oxidative coupling reactions and form stable complexes with heavy metals or mineral surfaces, which are more difficult to be degraded or m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76
CPCG01N21/76
Inventor 吕继涛罗磊张淑贞
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI